Sai Wah Wong

8471629, Jun 25, 2013

Jun 30, 2011

13/173791

Axel Thomsen - Austin TX, US
Zhongda Wang - Sunnyvale CA, US
Sai Chu Wong - San Jose CA, US
Yunteng Huang - Palo Alto CA, US

Silicon Laboratories Inc - Austin TX

H03F 1/14
H03G 3/20

330 51, 330129

A power control circuit is coupled to receive a feedback signal from a power amplifier (PA) and generate a control signal to control a variable gain amplifier (VGA) coupled to an input to the PA based on the feedback signal. The power control circuit may include, in one embodiment, a mute circuit to generate a mute signal to be provided to the VGA when the control signal is less than a first level and a clamp circuit to clamp a control voltage used to generate the control signal from exceeding a threshold level.

20120250789, Oct 4, 2012

Mar 31, 2011

13/077385

Sai Chu Wong - San Jose CA, US
Yunteng Huang - Palo Alto CA, US

H04L 25/03
H03B 28/00

375296, 327129

A technique includes generating an angle modulated square wave signal and progressively filtering the angle modulated square wave signal in a transmitter using a plurality of low pass filters to produce a modulated sinusoidal signal to drive an antenna. The technique includes programming the transmitter to tune a corner frequency of the filtering to a frequency within a range of frequencies selectable using the programming, based on a carrier frequency associated with the modulated sinusoidal signal.

20120252383, Oct 4, 2012

Mar 31, 2011

13/077405

SAI CHU WONG - SAN JOSE CA, US
YUNTENG HUANG - PALO ALTO CA, US

H04B 1/04

4551271

A transmitter is adapted to be programmed to select an amplifier operating class for the transmitter out of a plurality of amplifier operating classes. The transmitter is also adapted to operate according to the selected amplifier operating class to communicate a signal to an antenna.