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JP5269576B2 |
A signal modulator that can control transmission power if level adjustment of a continuous signal from an oscillator is executed is provided. A pulse generator of one example of a signal modulator includes an oscillator, a control signal...
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JP5266040B2 |
To generate PWM signals of three levels for bridged transless (BTL) or the like from input PWM signals of two levels completely without using a low-pass filter. PWM signals of two levels are input to obtain a synchronous PWM signal synch...
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JP2013157847A |
To provide a triangular wave generation circuit that outputs a triangular signal with reduced temporal variations in the peak value.Sources of P channel transistors 11, 12 are connected to a high potential side power supply VDD, and sour...
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JP2013156326A |
To provide a backlight driving device of a liquid crystal display device that enables luminance of a backlight to be stabilized, resulting from being not readily affected by a phase variation of an external vertical synchronization signa...
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JP2013157818A |
To execute a mute process instantly at a transition from a power-on state to a power-off state, and prevent the mute process from being executed upon an input supply voltage drop in the power-on state.In a power-on state, a resistance R1...
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JP5262165B2 |
To provide a compact digital AGC circuit requiring no multiplier for operation, such as gain calculation. The digital AGC circuit comprises: a ΣΔ modulator 61 composed of a D/A conversion means 43 for outputting an amount of charge of ...
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JP5258827B2 |
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JP5234032B2 |
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JP5231406B2 |
A bidirectional direct sequence spread spectrum half-duplex RF modem. that can be applied to transmit and receive numerous types of analog and digital pulse modulation. The modem incorporates a SAW based correlator for performing the spr...
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JP2013132049A |
To provide a signal outputting apparatus and method and an image forming apparatus using the same which are capable of improving EMI characteristics.An image forming apparatus includes a function unit to function as the image forming app...
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JP5227295B2 |
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JP5219722B2 |
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JP5222267B2 |
A current sense circuit which comprises, first, an output transistor having gate, source, and drain. The drain is coupled to a load, the source is coupled to a power rail, the gate is coupled to a control voltage such that the output tra...
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JP5216987B2 |
An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. A circuit according to aspects of the present invention includes a capacitor to convert a first current to a first voltage...
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JP2013524594A |
A method and a circuit configuration are provided for generating a multiphase PWM signal. For this purpose a number of PWM generators are provided, which respectively have one counter, two comparators and one state memory, each PWM gener...
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JP2013115672A |
To provide a pulse width modulation circuit that can solve the problem in which, at a transition to a power-off state, leakage currents charging storage means bring both inputs of two output elements to a high level and both outputs ther...
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JP5187640B2 |
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JP5177094B2 |
A power supply for supplying electric power comprises a power circuit which supplies L channels of electric power (L: positive integer), a control circuit board which outputs multiple types of control signals including a digital control ...
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JP5165463B2 |
A pulse width modulation (PWM) controller includes a first counter for counting a reference clock signal, and thus outputting a first count value, a leading edge control signal generator for outputting a leading edge control signal on a ...
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JP2013055620A |
To provide a compact and low-cost current control device even in the case of a multi-channel configuration using a microcomputer and a current control IC.The current control device includes: a current control semiconductor element 1; and...
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JP5167196B2 |
To achieve sound quality improvement while suppressing an increase in cost as much as possible, in class D amplification processing which amplifies a pulse signal. A pulse width adjusting part 30 of a voice processor 10 adjusts the pulse...
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JP5152741B2 |
A pulse width modulation (PWM) wave output circuit that efficiently and accurately outputs dual PWM waves includes two comparators, an OR circuit, and an AND circuit. A voltage generator supplies the comparators with ramp voltages having...
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JP2013038693A |
To provide a pulse generation circuit that implements desired control by a controlled object while adopting a configuration for generating an irregular pulse signal.If a predetermined time passes, a count value of a counter CO1 of a coun...
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JP2013038744A |
To provide an oscillation circuit that outputs an oscillation signal of a highly precise frequency.The oscillation circuit includes: an RS flip-flop 11 for generating output signals Q, QB on the basis of a set signal and a reset signal; ...
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JP5143515B2 |
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JP2013017047A |
To provide a pulse width modulator that has an increased dynamic range by implementing an increased resolution.The pulse width modulator includes: a sequence counter 24 for counting a count value in synchronism with a clock; an intermedi...
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JP5126558B2 |
When a switching amplifier transitions into a power-off state, a switch is turned off and a power supply controller forcibly discharges a capacitor and forcibly reduces a reference potential with respect to a second power supply voltage....
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JP2013005301A |
To prevent a wasteful discharge of a voltage accumulated in accumulation means.When an output of a comparator COMP1 is at a high level, a capacitor C3 is charged with a voltage of a capacitor C1. When the output of the comparator COMP1 i...
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JP5099699B2 |
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JP5091579B2 |
A load control unit for controlling the supply of an electric power to a load from battery in accordance with a pulse-width modulation control includes: a reference voltage generating unit; a first charging/discharging unit; a second cha...
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JP2012227693A |
To provide a PWM signal generation device that effectively reduces noise such as radiation noise by reducing a circuit scale.A CPU 204, a counter 201, a register 202 and a comparator 205 generate a variation clock that is a frequency var...
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JP2012227692A |
To provide a PWM signal generation device that can output a PWM signal of double resolution in a simple circuit without doubling the frequency of a reference clock, and can reduce power consumption.The PWM signal generation device that o...
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JP5073580B2 |
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JP2012528498A |
The present application provides a method of synchronizing PWM outputs from master and slave devices for switch mode power supplies operating in a master-slave configuration as a whole, avoiding problems such as beat frequency generation...
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JP2012217118A |
To stabilize the response of a pulse-width modulation signal when an amplitude of an audio signal becomes excessive at a negative side.A pulse-width modulation circuit 10 comprises: a clock generation circuit 11; a differential amplifier...
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JP5064942B2 |
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JP5049707B2 |
Provided is a control technique of a PWM conversion type power converter capable of compensating for a voltage error due to voltage drop mainly at a switching element and managing a switching time of a PWM signal at the same time, and ca...
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JP5053247B2 |
A mask system for non-invasive positive pressure therapy of sleep disordered breathing includes a shell, a quick release mechanism, a cushion, a cushion retaining mechanism, a ball & socket and an adjustable headmount with straps. The sy...
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JP5036373B2 |
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JP5036056B2 |
A timer unit having a first output mode and a second output mode, the timer unit includes a first register that stores a first value, a second register that stores a second value, a third register that stores a third value, a counter tha...
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JP5023709B2 |
A communication system includes: a master; a plurality of slaves; and a bus for coupling among the master and the plurality of slaves in order to communicate asynchronously among the master and the plurality of slaves. The master supplie...
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JP5026488B2 |
A first situation indicating that the system is in a power-on situation or an un-mute situation, or a second situation indicating that the system is in a power-off situation or in a mute situation, is detected. When the first situation i...
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JP5016360B2 |
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JP5019408B2 |
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JP5008962B2 |
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JP2012151830A |
To provide a device and method generating a multi-channel pulse width modulation signal, and an LED system having the same.The present invention is related to a technique for driving a plurality of loads, in particular, related to a devi...
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JP4991936B2 |
A control apparatus for a switching device including a contactor drive and a coil includes a pulse width-controlled switching mechanism connected to a coil and a control unit connected to the switching mechanism. The control unit is conf...
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JP4991844B2 |
Provided are a pulse width modulation (PWM) apparatus and a light source-driving apparatus including the PWM apparatus. The PWM apparatus includes a voltage division part, a capacitor part, a first operational amplifier, a first noise re...
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JP2012142887A |
To make the finer output resolution of a variable voltage generation circuit capable of output in a simple and inexpensive configuration without resorting to increased specifications of pulse signal generation means for generating a PWM ...
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JP4984226B2 |
To provide a pulse width modulation circuit capable of utilizing a period as a temporal reference irrespective of the period of a triangle wave signal being varied discretely. The circuit includes triangle wave producing means (11) for p...
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