Patent ID: 9118274
Filing Date: 2015-08-25
Classification: H03B,H03K

Abstract:
1. A relaxation oscillator, comprising: a first amplifier having a first input terminal receiving an output voltage signal, a second input terminal receiving a reference voltage signal, and an output terminal for comparing the output voltage signal with the reference voltage signal and in response thereto outputting a control signal; a second amplifier having a first input terminal receiving the output voltage signal, a second input terminal connected to the output terminal of the first amplifier for receiving the control signal, and an output terminal connected to the first input terminal of the first amplifier and the first input terminal of the second amplifier for comparing the control signal with the output voltage signal and in response thereto outputting the output voltage signal; and a switch assembly connected to the second input terminal of the first amplifier for being driven by the control signal to selectively connect a first reference voltage or a second reference voltage to the second input terminal of the first amplifier as the reference voltage signal, wherein the output voltage signal is a periodic oscillating signal having a non-sinusoidal waveform.