Patent ID: 9402131
Filing Date: 2016-07-26
CPC Classification: G10L,H04R

Claim Text:
1. A buffer coupled to an acoustic motor, the buffer having an input and an output, the input having an input voltage and the output having an output voltage, the buffer being coupled to a load, the buffer comprising: an input transistor having a gate, a source, and a drain, the input transistor having a gate-to-drain capacitance, the input transistor also having an area; push-pull transistor circuitry coupled to the input transistor; wherein under a first set of operating conditions, a gate to source voltage of the input transistor remains constant and the output voltage is a buffered copy of the input voltage; wherein under a second set of operating conditions, the push-pull transistor circuitry selectively sinks or sources additional current to the load so that linearity of buffer operation is provided; such that the gate-to-drain capacitance of the input transistor is buffered allowing the area of the input transistor to be increased without reducing the gain of the motor.