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US 2012/0235743 A1Published application
Apparatus for outputting symmetrical signal and amplifier circuit
AssigneeDongbu HiTek Co., Ltd.
InventorSunwoo KWON
Life of this patent
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Abstract
A symmetrical signal generator that includes a first signal part configured to produce a first output pulse signal using a first input pulse signal and a second input pulse signal asymmetrical to each other, and a second signal part configured to produce a second output pulse signal using the first input pulse signal and the second input pulse signal. The second output pulse signal is one inverted to be symmetrical to the first output pulse signal.
Claims20
A symmetrical signal generator comprising:
- a first signal part configured to produce a first output pulse signal using a first input pulse signal and a second input pulse signal asymmetrical to each other;
- and
- a second signal part configured to produce a second output pulse signal using the first input pulse signal and the second input pulse signal,
- wherein the second output signal is one inverted to be symmetrical to the first output pulse signal.
1 more element
An amplifier circuit comprising:
- an operational amplifier configured to perform an operational amplification a combined signal obtained by combining an input signal and feedback signals applied thereto;
- a PWM unit configured to produce a positive PWM signal and a negative PWM signal asymmetrical to each other by comparing an output signal from the operational amplifier with a reference signal;
- and
- a symmetrical signal generator operated by switching signals derived from the positive PWM signal and the negative PWM signal to provide a first pulse signal and a second pulse signal,
- wherein the second pulse signal has an inverted one from the first pulse signal and the first pulse signal and the second pulse signal are used as the feedback signals.
2 more elements
Dependencies are inferred from the claim text.