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JPH06318873A |
PURPOSE: To obtain an accurate quantization output of a differentiation value of an input signal by devising the circuit such that an offset produced by a quantization means is not added to an output. CONSTITUTION: The differentiation ci...
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JPH0691369B2 |
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JPH0691477B2 |
A radio receiver or transmitter including a tunable filter constituted by an N-path filter (14) having a local oscillator (52), the centre frequency of which filter is displaced from the oscillator (52) frequency through the use of feedb...
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JPH0691419B2 |
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JPH06308417A |
PURPOSE: To provide a comparatively inexpensive device and method for controlling the positioning of a light beam. CONSTITUTION: Concerning a laser scanner provided with a spinner 58, an erroneous spot alignment detector 68 and an errone...
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JPH06301800A |
PURPOSE: To provide the switched capacitor integrator with high precision by preventing a leak current of the CMbS switch of the switched capacitor integrator from becoming an output voltage noise. CONSTITUTION: The conventional switched...
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JPH06303143A |
PURPOSE: To obtain an integration type D/A converter with high accuracy in which it is prevented that a leakage current of a CMOS switch of a switched capacitor integration device is an output voltage noise. CONSTITUTION: The D/A convert...
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JPH0683015B2 |
A continuous time electrical filter fabricated as an integrated circuit includes capacitors (CO,CN) and resistors (R1,R2). Since capacitors and resistors are difficult to integrate with accurately defined values a trimming circuit is pro...
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JPH0638509Y2 |
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JPH06276054A |
PURPOSE: To improve the reception sensitivity by varying the characteristics of a 2nd intermediate frequency filter, used for the receiving circuit, according to the frequency shift of a received signal. CONSTITUTION: The 2nd intermediat...
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JPH06252704A |
PURPOSE: To improve the stability of a frequency characteristic against an environmental change and a secular change. CONSTITUTION: The filter is formed by externally mounting required resistors R3-R6 and a capacitor C3 to a filter formi...
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JPH0671194B2 |
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JPH0669132B2 |
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JPH0669131B2 |
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JPH0666595B2 |
A lock-in amplifier having an input terminal (E); a pair of signal processing channels (16, 18) each having an input; and an output (20, 22); a pair of switching devices (S1, S2) coupled between the input terminal and the inputs of the s...
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JPH0666640B2 |
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JPH0666639B2 |
Many signal processing applications of practical importance (for example, continuous-signal filtering) require high-precision temperature-insensitive transconductance elements. In accordance with one feature of this invention, a referenc...
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JPH06224696A |
PURPOSE: To provide the analog signal addition circuit which has a lower power consumption and a small occupation area on a semiconductor chip and does not have a frequency characteristic which limits the use condition to a specific freq...
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JPH0658623U |
[Constitution] The temperature-compensated oscillation circuit 21 and the frequency adjustment circuit 47 are provided, and the frequency adjustment circuit 47 adjusts the oscillation frequency of the crystal oscillation circuit 35 based...
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JPH06204800A |
PURPOSE: To prevent the delay in the operation between switch sections in a switched capacitor circuit. CONSTITUTION: The switched capacitor circuit is constituted of 1st and 2nd switch sections 1, 2 connected to an input terminal IN, ca...
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JPH06197160A |
PURPOSE: To provide a terminal station for wire communication which terminates lines connected with terminal stations and can easily meet various conditions imposed upon the terminating impedance of the terminal station. CONSTITUTION: A ...
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JPH0640617B2 |
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JPH06120837A |
PURPOSE: To produce the small capacities equivalently and to reduce the gain of a feedback stage by connecting three electrostatic capacities in a T-shape to prescribe the gain of a feedback part with regard to a delta sigma modulator co...
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JPH0629229U |
A delay-locked-loop (DLL) controls the cutoff frequency of a filter in an exemplary mass storage servo control channel. The cutoff frequency is adjusted in response to a clock pulse which updates the DLL. Between pulses, the DLL holds it...
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JPH0697778A |
PURPOSE: To provide an SC decimeter circuit which is capable of selecting and receiving wide band width signals and narrow band width signals as a small-sized integrated circuit, without the need of a filter for a low frequency. CONSTITU...
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JPH0626348B2 |
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JPH0624311B2 |
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JPH0624313B2 |
PURPOSE:To obtain a hysteresis characteristic by providing the 1st switch, the 1st capacitor, an operational amplifier, the 2nd switch, the 1st inverter, the 3rd, 4th, 5th switches and the 2nd capacitor so as to obtain an output from the...
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JPH0678174A |
PURPOSE: To simply change the time constant of a filter to be adjusted without being influenced by any broadcasting system. CONSTITUTION: A saw tooth wave generating circuit 1 generates a saw tooth wave in which the frequency of a leadin...
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JPH0669418A |
PURPOSE: To make an angle of a square obtuse and reduce variances in relative precision by an etching error by a method wherein layout patterns of unit capacitance are made an equilateral polygon of a pentagon or more. CONSTITUTION: Layo...
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JPH0661794A |
PURPOSE: To improve the S/N without varying a transfer function and to prevent the dynamic range from being lowered. CONSTITUTION: Useless charge absorbing capacitors C1-C3 each having the same capacitance as that of a unit capacitor are...
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JPH0661793A |
PURPOSE: To reduce the circuit scale and manufacture dispersion and to prevent the cut-off frequency deviating from the designed value by adding an input capacitor to the filter device to reduce a transfer charge quantity to a feedback c...
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JPH0661803A |
PURPOSE: To provide a charge pump with which a buffer stage and a capacitor terminal requiring no negative power voltage are grounded by using a discharging switch which opens and closes in response to the 1st and 2nd value of a periodic...
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JPH0645875A |
PURPOSE: To suppress an oscillation phenomenon at the time of cancel operation of an offset voltage by providing a capacitor between the inverted input terminal of an operational amplifier and a reference voltage in the offset cancel typ...
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JPH0645873A |
PURPOSE: To provide a variable waveform equalizer provided in a repeater circuit or a receiver used without sacrificing the equalization precision at the time of long distance transmission of a digital signal. CONSTITUTION: This equalize...
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JPH0637546A |
PURPOSE: To prevent the degree of frequency selection of a band-pass filter from deteriorating and inter-code interference, etc., from occurring even when the carrier frequency of a digital phase modulation signal is deviated. CONSTITUTI...
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JPH0621766A |
PURPOSE: To eliminate the effect of switch charge injection in the signal processing use circuit array where an electric signal is processed in a form of a sampled analog current. CONSTITUTION: Two cascade connection current memory cells...
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JPH063864B2 |
A switched capacitor circuit comprises first and second switches connected in series between an input terminal and a first fixed potential terminal and third and fourth switches connected in series between an output terminal and the firs...
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JPH061499B2 |
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JPH05343950A |
PURPOSE: To prevent deterioration in an error rate of data by selecting a cut-off characteristic of a filter in response to a frequency of an input data signal. CONSTITUTION: A variable frequency divider circuit 2 decides a frequency div...
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JPH05283614A |
PURPOSE: To provide a multilayer capacitor for switched capacitors which has a shielded plate isolated from the noise, generated from external noise sources or a semiconductor substrate. CONSTITUTION: The structure of a three-layer capac...
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JPH05275909A |
PURPOSE: To provide a superhigh frequency functional past using a triplet resonator which includes a superhigh frequency circuit function, can contain other circuit component parts, and also can facilitate the surface packaging. CONSTITU...
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JPH05267991A |
PURPOSE: To faithfully transmit a voltage level of a DC component of an input signal to an output signal by controlling an amplifying means, based on a feedback signal generated in accordance with an offset signal, and reducing a DC offs...
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JPH05267994A |
PURPOSE: To provide the filter circuit and the vortex quantity converting circuit which are improved so that a noise component contained in a sensor can be eliminated effectively. CONSTITUTION: The circuit is provided with a filter eleme...
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JPH05243857A |
PURPOSE: To extremely reduce the influence based on the stray capacitance not to be influenced by an offset voltage of an operational amplifier by providing plural switches between an inversion input terminal and an output terminal of a ...
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JPH05243944A |
PURPOSE: To provide a semiconductor switching circuit capable of reducing a feed-through noise without being affected by a work variation in a process. CONSTITUTION: An analog switch 2 is constituted of MOS transistors 2a, 2b, and a comp...
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JPH0568133U |
[Purpose] The purpose is to realize a PLL device that widens the capture range and improves the characteristics when locked. [Constitution] This device has two input ends, a phase comparator that outputs a voltage corresponding to the ph...
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JPH0560687B2 |
A novel switched capacitor gain stage uses a unique circuit design and clocking technique that reduces the component mismatch offset voltage and the clock-induced feedthrough offset voltage produced by the circuit. The totalcapac- itance...
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JPH05218804A |
PURPOSE: To ensure a large settling time with an operational amplifier without using a non-overlapping clock by using a common clock to control. a MOS switch serving as an analog switch. CONSTITUTION: The clock signals CLK ere inputted t...
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JPH05199360A |
PURPOSE: To obtain the signal processing circuit of an image sensor in which an occupied area of an integrated circuit is reduced and a circuit element forming an I/V converter and an integration device or the like has an accurate circui...
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