US 6,982,588 B1 | ||
Inverse function method for semiconductor mixer linearity enhancement | ||
Heng-Chih Lin, Plano, Tex. (US); Chien-Chung Chen, Plano, Tex. (US); and Ranjit Gharpurey, Ann Arbor, Mich. (US) | ||
Assigned to Texas Instruments Incorporated, Dallas, Tex. (US) | ||
Filed on Jun. 16, 2004, as Appl. No. 10/869,680. | ||
Int. Cl. G06G 7/44 (2006.01); G06G 7/16 (2006.01) |
U.S. Cl. 327—359 | 6 Claims |
1. A mixer circuit comprising:
a differential rf input driver;
a differential local oscillator input circuit coupled to the differential rf input driver;
a non-linear load coupled to the differential local oscillator input circuit wherein the non-linear load compensates for non-linearity
of the differential rf input driver;
wherein the non-linear load comprises a first diode-connected PMOS transistor coupled to the differential local oscillator
input circuit and a second diode-connected PMOS transistor coupled to the differential local oscillator input circuit;
wherein the non-linear load further comprises two cross-coupled PMOS transistors.
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