Ming Yang

6710657, Mar 23, 2004

Oct 12, 2001

09/975849

Ming Yang - Princeton NJ

Anadigics, Inc. - Warren NJ

H03F 345

330254, 330278

A current steering-type gain control circuit provides a non-zero minimum gain in response to readily reproducible control signal conditions and without requiring sophisticated control-signal-generating circuitry. The gain control circuit is adapted from a conventional differential pair of current-steering transistors, biased by first and second control signals respectively. To provide a well-defined non-zero minimum gain, the gain control circuit includes at least one additional current steering transistor that further steers current to the output when conducting in the minimum gain state. By further including one or more additional pairs of current steering transistors, the gain control circuit also provides a plurality of well-defined states with gains between the maximum and minimum gain values of the circuit. The minimum and intermediate gain values, may be selected by varying the physical characteristics of the current steering transistors which may be BJTs or FETs. The circuit may be implemented in a single-ended or differential configuration.

7149483, Dec 12, 2006

Oct 28, 2003

10/695226

William Reinisch - New York NY, US
Ming Yang - Princeton Junction NJ, US
Haim Harel - New York NY, US

Magnolia Broadband Inc. - Bedminster NJ

H03C 7/02
H04B 1/02
H04B 7/00

455101, 455103, 455 91

A method for amplifying diversity transmit signals includes receiving a transmit signal at a vector modulator, where the vector modulator processes the transmit signal to yield diversity transmit signals, amplifying each of the diversity transmit signals according to a gain using at least one power amplifier, and transmitting the amplified diversity transmit signals at a plurality of antennas.