| US 7,616,931 B2 | ||
| System and method for reducing phase distortion in a linear transmitter | ||
| Meng-An Pan, Irvine, Calif. (US) | ||
| Assigned to Broadcom Corporation, Irvine, Calif. (US) | ||
| Filed on Nov. 12, 2004, as Appl. No. 10/986,141. | ||
| Claims priority of provisional application 60/606924, filed on Sep. 03, 2004. | ||
| Prior Publication US 2006/0052071 A1, Mar. 09, 2006 | ||
| Int. Cl. H04B 1/04 (2006.01) | ||
| U.S. Cl. 455—127.3 [455/114.3; 330/252] | 11 Claims |
| 1. A power amplifier, comprising:
two sets of differential pairs; and
a differential inductor coupled to each of the differential pairs,
wherein each of the differential pairs includes a bias transistor supplying a bias voltage to the power amplifier, the differential
pairs each supplying a different bias voltage to bias their respective bias transistors to operating points in which their
respective gate capacitances are both non-linear functions of their respective bias voltages, the gate capacitance of a first
of the two sets of differential pairs increasing as the bias voltage increases at its respective operating point, and the
gate capacitance of a second of the two sets of differential pairs decreasing as the bias voltage increases at its respective
operating point.
|