Avago Technologies General IP (singapore) Pte. Ltd.

Avago Technologies International Sales Pte. Limited

Choong Yul Cha

Hung-Ming Chien

Ali Afsahi

Hongrui Wang

Dandan Li

Long Bu

Stephen C Au

Ravi Gupta

A synchronous switching regulator circuit for supply regulation of a switching circuit includes a pass transistor to couple the switching circuit to a supply voltage. The synchronous switching regulator circuit further includes a switch that is operable to synchronously turn off a flow of a supply current through the pass transistor. The switching circuit can be controlled by a switching signal, and the switch can operate in synchronization with the switching circuit.

Synchronous switching regulator circuit

A broadband digital transmitter is disclosed. The digital transmitter includes a vector decomposer circuit, a phase selector circuit, and a digital power amplifier (DPA). The vector decomposer circuit receives baseband in-phase (I) and quadrature (Q) signals and decomposes the baseband I and Q signals into an offset envelope signal and a non-offset envelope signal. The phase selector circuit receives a plurality of phase offset local oscillator (LO) signals and outputs, responsive to the baseband I and Q signals, offset LO signals and non-offset LO signals. The DPA processes the offset envelope signal, the non-offset envelope signal, the offset LO signals, and the non-offset LO signals to generate an output signal of the digital transmitter.

Broadband digital transmitter using &#x3c0;/4 phase offset local oscillator (LO) signals

Growing community of inventors

Irvine, CA, United States of America

Choong Yul Cha