Stmicroelectronics (shenzhen) R&d Co. Ltd.

Stmicroelectronics S.r.l.

Kelvin Jian Wen

Mei Yang

XiangSheng Li

YueHua Wang

Xaut Zhang

Cristiano Meroni

Xian Feng Xiong

Zheng Hua Song

A power amplifier includes a clamping circuit configured to provide a clamped voltage from a power supply; an amplifier pair having first inputs coupled to the clamping circuit, second inputs and an output for providing an amplified signal; and a biasing circuit coupled between the clamping circuit and the second inputs. The biasing circuit is configured to adjust input bias voltages of the amplifier pair such that the output of the amplifier pair varies proportionally to a change of the power supply.

Power amplifier

A clamping circuit for a class AB amplifier includes a reference voltage circuit, four NPN Darlington transistors having inputs coupled to the reference voltage circuit, and outputs for providing four clamped voltages and a split NPN Darlington transistor having an input coupled to the reference voltage circuit, and four separate outputs for providing four AC ground voltages.

Input clamping structure for sound quality improvement in car-radio class-AB power amplifier design

A clamping circuit for a class AB amplifier includes a reference voltage circuit, four NPN Darlington transistors having inputs coupled to the reference voltage circuit, and outputs for providing four clamped voltages, and a split NPN Darlington transistor having an input coupled to the reference voltage circuit, and four separate outputs for providing four AC ground voltages.

Growing community of inventors

Shenzhen, China

Kelvin Jian Wen