Patent ID: 7282970

Claim:
A one-shot bipolar waveform-generating device, comprising: a clock waveform generation circuit generating a square wave as a basic clock frequency, an inverted square wave and a triangle wave; a divisor circuit electrically connected to said clock waveform generation circuit for generating a clock signal in response to said inverted square wave; a one-shot circuit for generating a trigger signal; a clock synchronizing gate-controlled trigger generation circuit electrically connected to said divisor circuit and said one-shot circuit, and generating a gate-controlled signal with a duty cycle representing a twice of said basic clock frequency in response to said clock signal and said trigger signal, thereby a rising edge of said gate-controlled signal synchronized with a rising edge of said basic clock frequency to cut a cycle of said basic clock frequency; a level adjustment circuit electrically connected to said clock waveform generation circuit for adjusting a level of said triangle wave; an analog switch electrically connected to said clock synchronizing gate-controlled trigger generation circuit and said level adjustment circuit to receive said square wave, and controlled by said gate-controlled signal to generate a sawtooth wave with a positive polarity and a negative slope and a sawtooth wave with a positive polarity and a positive slope; a first inverter electrically connected to said analog switch for inverting said sawtooth wave with said positive polarity and said positive slope to an inverted sawtooth wave; and an adder electrically connected to said first inverter for generating a bipolar sawtooth wave with a negative slope in response to said sawtooth wave with said positive polarity and said negative slope and said inverted sawtooth wave.