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WO/2008/024729A1 |
A broadband impedance matching circuit using high pass and low pass filter sections alternatingly cascaded together to yield considerably broader band matching than two high pass sections or two low pass filter sections. By alternating t...
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WO/2008/021305A2 |
Systems and methods for wireless transmission of a modulated audio signal to a receiver using near-field or proximity transmission are presented. In exemplary embodiments of the present invention, such systems and methods can receive a b...
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WO/2008/018276A1 |
A voltage controlled oscillator is provided to make it possible to enlarge a variable frequency range with an increase in a conversion gain suppressed. A converter (12) converts an input voltage to a first physical amount. A variable con...
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WO/2008/010331A1 |
Output conductance of a differential current output type circuit constituting a filter body (1) and having a variable negative resistor connected between differential output lines is automatically regulated. The output conductance automa...
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WO/2008/005677A1 |
A loop filter with noise cancellation includes first and second signal paths (720, 730), an operational amplifier (op-amp) (736), and a noise cancellation path. (740) The first signal path (720)provides a first transfer function (e.g., a...
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WO/2007/119264A1 |
An input impedance circuit characterized by comprising a first differentiation circuit (201a) having an input terminal and an inverted output terminal, and a first capacitor (202a) connected between the inverted output terminal and the i...
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WO2006107261A9 |
The present invention relates to a programmable microwave circuit (1 ) four ports (3), and combinations of such circuits. Between each pair of ports there is at least one connection without amplification, at least one connection having a...
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WO/2007/108138A1 |
A composite band-pass filter receives a quadrature input signal and passes an intermediate frequency signal while attenuating all other signals including an undesired image signal. The composite band-pass filter is comprised of a continu...
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WO/2007/105152A2 |
There is provided a method that comprises identifying a parasitic signal transfer in a filter using a signal-directed graph; and adding compensation paths to the filter to reduce or eliminate the effect of the parasitic signal transfer. ...
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WO/2007/102133A1 |
There is provided a method of configuring a radio receiver, the radio receiver comprising signal receiving means, and at least one adjustable component coupled to the signal receiving means; the method comprising setting the at least one...
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WO/2007/104010A2 |
Improvement of quantization errors that arise in a delay line with finite resolution. A direct digital synthesizer (DDS), which contains numerically controlled oscillator (NCO) and a digital-to-phase converter (DPC), is placed in the fee...
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WO/2007/101073A2 |
A circuit for transmitting signals includes a transformer having an input side and an output side, the input side having a first end and a second end. A first transistor is coupled to the first end of the transformer, the first transisto...
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WO/2007/094298A1 |
A selector (5) is switched to generate a learning signal (B) by a signal generator (4) and supply it to a filter (1) used in an actual operation. The learning signal (B) supplied to the filter (1) is supplied subjected to filter processi...
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WO/2007/087774A2 |
The invention relates to a circuit for adjusting an impedance between two terminals, said impedance including the input impedance of the circuit. The aim of the invention is to enlarge the adjustment range and to stabilize the operating ...
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WO/2007/088211A1 |
The invention relates to a device comprising at least one delay line for applying a variable delay to a clock signal and a controller for controlling the variable delay of the delay line. Each delay line comprises a plurality of concaten...
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WO/2007/082345A1 |
The present invention provides in an in-line filter for coupling a voice frequency equipment (VFE) to a transmission line that can be used for transmission of DSL data and telephone signals. The filter comprises electronic components tha...
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WO/2007/081368A2 |
A multi-scale spike detector for performing multi-resolution spike detection’s of a signal is provided. The spike detector includes a gamma filter having cascaded low-pass filters. The cascaded filters collectively provide different cu...
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WO/2007/073150A1 |
A phase shifter circuit (1). The circuit (1) has a poly-phase generator unit (10). The generator (10) is arranged for generating from an input signal I(φ) signals (SI-S4) differing in phase with respect to each other. The poly-phase gen...
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WO/2007/069359A1 |
A second operational amplifier (7) is arranged, as an interface circuit (6), between a first operational amplifier (5) outputting the control voltage (Vcd) of a dummy filter (2) and a main filter (1), and the reference voltage (Vr) of th...
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WO/2007/069360A1 |
A cutoff frequency adjusting circuit includes a filter circuit (1) provided with a plurality of resister elements, and a switch to one of the resister elements, and a capacitor. A cutoff frequency of the filter circuit (1) is determined ...
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WO/2007/070286A2 |
A method and apparatus for capacitance multiplication using two charge pumps. A first charge pump (206) provides a current signal (I216) that is first conducted by a resistor (310) of an RC network and then split into three current paths...
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WO/2007/063643A1 |
An automatic adjustment circuit comprises a replica (1) constituted of either a circuit block of a portion of a filter body (3) or a combination of the circuit block, and fed with a reference signal (2) from the outside, for outputting s...
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WO/2007/058012A1 |
It is possible to provide a filter adjusting method, a filter adjusting device, and a filter circuit for adjusting the characteristic of an analog filter by using a simple configuration. The filter adjusting method for adjusting the char...
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WO/2007/046732A1 |
The present invention relates to a voltage-to-current transconductance stage arrangement comprising a single-ended input, an emitter-coupled pair of transistors (1,2), comprising a first transistor (1) and a second transistor (2), the em...
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WO/2007/034222A2 |
The present invention addresses a need for reducing the power consumption in a baseband filter used in a front-end wireless receiver while providing the necessary linearity. In particular, relatively high linearity can be obtained with l...
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WO/2007/035956A1 |
An electrical signal transformation device (100) configured for emulation of physical, for example, optical, phenomena and/or a mathematical or logical process. The device employs a first plurality (X oriented Li j ) , second plurality (...
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WO/2007/031594A1 |
The invention relates to power amplifiers having adjustable output impedance. A power amplifier according to the invention can be used, for example, for feeding a radio frequency transmission signal into an antenna of a mobile communicat...
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WO/2007/022705A1 |
The present invention provides methods and apparatuses for a polyphase filter, comprising: a first and second cascoded differential amplifiers configured to receive a first and second differential signals, the first cascoded differential...
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WO/2007/014060A1 |
In a signal communication device, a frequency-selective filter has at least one component that is biased by a control signal to establish a center frequency of the frequency- selective filter. A closed-loop bias generator is provided to ...
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WO/2007/008269A1 |
The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may comprise transistors used as switching element...
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WO/2007/007439A1 |
A plurality of low-pass filters (2-1, 2-2, 2-3) are cascaded to the post-stage of an OTA (1) and a plurality of high-pass notch filters (3-1, 3-2, 3-3) are cascaded further to the post-stage thereof so that a high-pass filter having a hi...
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WO/2007/004432A1 |
To achieve a voltage/current converting method and a transconductance amplifier wherein a sufficient amplitude can be obtained and the flexibility of design is high. There are included a step of converting a first voltage signal to a fir...
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WO/2006/132090A1 |
To realize a suitable operation of a variable resistor even without arranging that the drain-source voltage of the variable MOS resistor be equal to that of a reference MOS resistor. The gate voltage (Vp12) of a variable MOS resistor is ...
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WO/2006/128075A1 |
Calibrating a filter (114,116) is disclosed. The filter (114,116) is reconfigured as an oscillator during calibration. Switches (swl,sw2 ) and/or other implementations of reconfiguring a filter are used to reconfigure the negative feedba...
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WO/2006/117943A1 |
A filter circuit wherein NF of a Gm-C filter is improved. There are included a filter part that comprises a first capacitance and at least one first transconductance amplifier the mutual conductance of which varies in accordance with a f...
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WO/2006/116523A1 |
A continuous-time equalizer includes a first transconductance circuit to set a gain of an amplified signal in a link and a second transconductance circuit to set a zero frequency in a transfer function of the equalizer. The zero frequenc...
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WO/2006/107458A1 |
An automatic quadrature phase compensation system comprises an on-chip analog phase sense circuit (106) capable of detecting small differences in phase error and providing a corresponding DC voltage (Vout), a voltage-controlled or progra...
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WO/2006/106718A1 |
An impulse waveform generating apparatus comprises a multistage delay pulse signal generating part for generating a plurality of delay pulse signals from a timing signal; a signal source signal generating part for generating, from the de...
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WO/2006/100629A2 |
In order to provide a filter device (50, 60) as well as a method for processing input signals, in particular I[ntermediate]F[requency] input signals, for example sound signals, such as received television signals, wherein a bandpass func...
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WO/2006/085238A1 |
The invention relates to a receiver (1) comprising an amplifier (31-34) for amplifying an antenna signal, which amplifier (31-34) comprises an amplifier input (11a) and an amplifier output (12a,12b), the amplifier input (11a) being a sin...
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WO/2006/085239A1 |
The invention relates to a receiver (1) comprising an amplifier (31-34) for amplifying an antenna signal, which amplifier (31-34) comprises an amplifier input (11a) and an amplifier output (12a, 12b), the amplifier input (11a) being a si...
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WO/2006/083556A2 |
A clock signal generation system and method to distribute at least one clock signal to a plurality of points on a circuit board using a plurality of digitally programmable delay circuits (10) each of which delays the clock signal (Clockl...
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WO/2006/083432A1 |
A reconfigurable circuit and a related method for its use, the circuit including multiple microelectromechanical systems (MEMS) switches connected between selected points in the circuit. The MEMS switches are controlled to select a desir...
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WO/2006/082648A1 |
Noise the frequency of which is lower than a clock frequency is reduced, while DC components included in the clock are suppressed. A clock buffer (1) has a frequency characteristic of bandpass type, and its passband includes the fundamen...
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WO/2006/078009A1 |
A receiver apparatus and an electronic device wherein the degradation of symbol signal waveforms can be suppressed. There are included a filter (12) for outputting an output signal having a symbol every given time interval; and an interm...
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WO/2006/069353A1 |
According to one embodiment, a phase interpolator comprising an alternating current (AC) coupling capacitor, and a common mode bias keeper circuit coupled to the AC coupling capacitor is presented. In one embodiment, the AC coupling capa...
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WO/2006/064658A1 |
A filter characteristic adjusting apparatus and a filter characteristic adjusting method wherein the increase in circuit area of the filter characteristic adjusting apparatus is suppressed and wherein the filter characteristic frequency ...
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WO/2006/059414A1 |
A filter adjusting circuit for an analog filter circuit such as Gm-C filter or the like, wherein an input signal (IS) from a reference signal generating circuit (1) is input to a Gm-C filter (2), filtered thereby and thereafter converted...
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WO/2006/035230A1 |
The voltage produced by an input current (in) is sampled (S1, S2, S3) and stored on the gate (46) of a Fet (T1). The stored gate voltage allows the FET to function as the reference current source of a current mirror (T2, T3) which genera...
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WO/2006/033735A2 |
An active filter with compensation to reduce Q-enhancement is disclosed. The filter may include a first amplifier (202a) and a second amplifier (202b) coupled to the first amplifier. The second amplifier having a negative feedback loop i...
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