Patent ID: 9008333
Filing Date: 2015-04-14
Classification: G10H,H03F

Abstract:
1. An amplifier comprising: an input configured to receive a signal from a musical instrument; an overdrive shaping circuit electrically coupled to the input and configured to receive the input signal, the overdrive shaping circuit including one or more elements for harmonic shaping of the signal including a soft clipping cell with diodes arranged in a current steering bridge that limit a maximum signal swing to a clipping voltage and a sag controller that reduces the clipping voltage of the soft slipping cell when the input signal to the soft clipping cell exceeds a threshold; a power amplifier circuit electrically coupled to the overdrive shaping circuit, the power amplifier circuit configured to receive a harmonic shaped signal from the overdrive shaping circuit, wherein the power amplifier circuit includes a switchmode amplifier to amplify the harmonic shaped signal, and includes means to increase the output impedance of the switchmode amplifier; and an output coupled to the power amplifier circuit, the output configured to output a signal amplified by the switchmode amplifier.