Patent ID: 7265612
Filing Date: 2007-09-04
Classification: H03F,H03K

Abstract:
1. A switching amplifier comprising: an oscillating circuit for generating a first oscillating signal and a second oscillating signal such that a reference level of an input signal is between a mean level and a valley of the first oscillating signal and between a peak and a mean level of the second oscillating signal, wherein the first and the second oscillating signals are identical in phase and in amplitude with respect to each other; a first control circuit for generating a first width-limited pulse-width-modulation (PWM) signal in response to the input signal and the first oscillating signal, the first width-limited PWM signal having a pulse each cycle with a width larger than or equal to a predetermined first width; a second control circuit for generating a second width-limited PWM signal in response to the input signal and the second oscillating signal, the second width-limited PWM signal having a pulse each cycle with a width larger than or equal to a predetermined second width; a first half-bridge switching circuit controlled by the first width-limited PWM signal for determining a potential at a first output terminal; and a second half-bridge switching circuit controlled by the second width-limited PWM signal for determining a potential at a second output terminal.