Abstract: A compact polarity-insensitive integrated circuit amplifier is described designed to be powered by a miniature low voltage battery of variable polarity. Low current, polarity corrected voltage sources are integrated into functional blocks to supply low current non-bidirectional elements and to provide a constant polarity bias to a substrate of CMOS circuits. Polarity corrected voltage sources are used to provide a polarity sensing function. The invention is embodied in a Class D amplifier which may comprise four n-channel MOSFET transistors arranged in an H-bridge configuration. Additional driver circuitry is described which increases the voltage of the pulse-width modulated input signal to the MOSFET transistors and also performs a pulse trimming function, which reduces parasitic crowbar currents in the amplifier output stage.

Abstract: A compact polarity-insensitive integrated circuit amplifier is described designed to be powered by a miniature low voltage battery of variable polarity. Low current, polarity corrected voltage sources are integrated into functional blocks to supply low current non-bidirectional elements and to provide a constant polarity bias to a substrate of CMOS circuits. Polarity corrected voltage sources are used to provide a polarity sensing function. The invention is embodied in a Class D amplifier which may comprise four n-channel MOSFET transistors arranged in an H-bridge configuration. Additional driver circuitry is described which increases the voltage of the pulse-width modulated input signal to the MOSFET transistors and also performs a pulse trimming function, which reduces parasitic crowbar currents in the amplifier output stage.

Abstract: A compact polarity-insensitive integrated circuit amplifier is described designed to be powered by a miniature low voltage battery of variable polarity. Low current, polarity corrected voltage sources are integrated into functional blocks to supply low current non-bidirectional elements and to provide a constant polarity bias to a substrate of CMOS circuits. Polarity corrected voltage sources are used to provide a polarity sensing function. The invention is embodied in a Class D amplifier which may comprise four n-channel MOSFET transistors arranged in an H-bridge configuration. Additional driver circuitry is described which increases the voltage of the pulse-width modulated input signal to the MOSFET transistors and also performs a pulse trimming function, which reduces parasitic crowbar currents in the amplifier output stage.

Abstract: A battery polarity insensitive amplifier utilizes a power management architecture to reduce the size of the circuitry used to accomplish the polarity correction function. An efficient Class D amplifier and compact voltage multiplying driver circuit reduce the size of the battery polarity insensitive amplifier circuit.