Frequency mixing apparatus

Details Frequency mixing apparatus Frequency mixing apparatus

2006-09-26

2006-09-26

Choe, Henry (Department: 2817)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C455S313000

Reexamination Certificate

active

07113008

ABSTRACT:
A frequency mixing apparatus is provided. In the frequency mixing apparatus, a PMOS transistor is coupled to an NMOS transistor in a cascode configuration and an LO signal is applied to the bulks of the PMOS and NMOS transistors so that an input signal applied to their gates is mixed with the LO signal. High isolation between the bulks and gates of the transistors resulting from application of the LO signal to the bulks prevents leakage of the LO signal, thereby decreasing a DC offset voltage. This renders the frequency mixing applicable to a DCR. Also, due to the cascade configuration similar to an inverter configuration, the frequency mixing apparatus can be incorporated in an FPGA of a MODEM in SDR applications. Frequency mixing based on switching of a threshold voltage decreases a noise factor and enables frequency mixing in a low supply voltage range, thereby decreasing power consumption.

REFERENCES:
patent: 3917964 (1975-11-01), Carlson
patent: 5481221 (1996-01-01), Gariboldi et al.
patent: 6104068 (2000-08-01), Forbes
patent: 6456170 (2002-09-01), Segawa et al.
patent: 6927619 (2005-08-01), Doyle
patent: 0 837 556 (1998-04-01), None
patent: WO 01/54266 (2001-07-01), None

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