Abstract: An amplifier circuit and its method of operation reduce leakage in the output stage of the under no-load or low-load conditions. The amplifier circuit includes an amplifier stage that generates an output signal, an output stage including an output device, a pre-driver device coupled to a gate of the output device, and a feedback connection from the output device to the amplifier stage. A power supply rail of the amplifier is provided by a first power supply voltage, and the output signal of the amplifier stage is coupled to an input of the pre-driver device. A power supply rail of the output stage is provided by a second power supply voltage having a magnitude less than the first power supply voltage. An increased voltage magnitude at the output stage is compensated by driving a channel field potential of the output device above the second power supply voltage.

Abstract: The disclosure relates generally to microphone and vibration sensor assemblies (100) having a transducer (102), like a microelectromechanical systems (MEMS) device, and an electrical circuit (103) disposed in a housing (110) configured for integration with a host device. The electrical circuit includes an output driver circuit, a low drop out (LDO) regulator circuit, and an over-voltage protection circuit with improved capacity and response time.

Abstract: The disclosure relates generally to microphone and vibration sensor assemblies (100) having a transducer (102), like a microelectromechanical systems (MEMS) device, and an electrical circuit (103) disposed in a housing (110) configured for integration with a host device. The electrical circuit includes an output driver circuit, a low drop out (LDO) regulator circuit, and an over-voltage protection circuit with improved capacity and response time.