A pulse-width modulation circuit is provided which is simple in circuit construction and is free from the non-linearity of a waveform of a carrier signal. The pulse-width modulation circuit comprises an operational amplifier, a comparator and a feedback circuit. The amplifier has inverting and ...
The invention provides a pulse-width modulation circuit in which an output from a latch circuit for holding a count obtained by counting a reference clock signal in accordance with the period of a signal to be modulated is compared by a comparator with an output from a ramp counter for counti...
PROBLEM TO BE SOLVED: To provide a pulse width modulation circuit capable of steepening rise or fall time of the pulse.;SOLUTION: The pulse width modulation circuit, which is provided with a first power source, is provided with a pulse-generating means for generating pulse from a first outpu...
A pulse-width modulation circuit of self-oscillation type produces a pulse-width modulated signal having a pulse width corresponding to an amplitude of an analog input signal. An integrator having an amplifier and at least one capacitor produces a triangle-wave signal. A comparator compares the tri...
A pulse-width modulator circuit includes a pulse-width modulator which has an input for a low-frequency modulation signal and an input for a carrier signal, a carrier signal generator which has an output connected to the carrier signal input of the pulse-width modulator for providing a carrier...
PURPOSE:To control the pulse width high accuracy by selection only a signal among plural delay signal in response to a digital data input, and gating a selected delay signal and a clock signal. CONSTITUTION:A data clock is converted into a clock whose frequency is 1/2 by a flip-flop 10,...
PULSE WIDTH MODULATION CIRCUIT 优质文献 相似文献Pulse width modulation circuit, corresponding device and method In an embodiment, a PWM modulation circuit includes a first circuit block configured to receive a square wave input signal and produce from the square wave... E Botti,N Gallo 被引量: ...
PULSE WIDTH MODULATION CIRCUIT 优质文献 相似文献Pulse width modulation circuit, corresponding device and method In an embodiment, a PWM modulation circuit includes a first circuit block configured to receive a square wave input signal and produce from the square wave... E Botti,N Gallo 被引量: ...
PROBLEM TO BE SOLVED: To provide a pulse width modulation circuit by which a motor is controlled with a low noise sound. ;SOLUTION: When a comparator CP1 (hereinafter called 'CP1') provides an output of a high level, a timing capacitor Ct (hereinafter called 'Ct') is charged via resistor...
PROBLEM TO BE SOLVED: To provide a pulse width modulation circuit in which the output frequency or the minimum pulse width is kept constant even at the time of pulse width modulation.;SOLUTION: The pulse width modulation circuit comprises means for generating a pulse depending on the ratio of ...