Patent ID: 7034609
Filing Date: 2006-04-25
Classification: H03F

Abstract:
1. A switching amplifier controller comprising: a switching output stage comprising an Hbridge having 4 power switches configured to drive a load in a bridge tied configuration; a shoot through detector operative to detect shoot through generated by the switching output stage and generate a shoot through signal in response thereto; a shoot through encoder operative to generate a shoot through feedback signal in response to the shoot through signal; an adaptation controller operative to generate adaptive control signals in response to the shoot through feedback signal; a timing controller operative to generate a first set of timing control signals in response to a PWM input signal and the adaptive control signals; a signal combiner operative to generate a second set of timing control signals in response to the first set of timing control signals; and a plurality of power switch drivers operative to generate power switch turn-on signals and power switch turn-off signals in response to the second set of timing control signals to control power switch turn-on and turn-off switching transitions such that dead time associated with the switching transitions is substantially eliminated and further such that shoot through is negated during switching transitions subsequent to detection of shoot through via the shoot through detector.