High frequency XOR with peaked load stage

Details High frequency XOR with peaked load stage High frequency XOR with peaked load stage

2006-11-28

2006-11-28

Chang, Daniel (Department: 2819)

Electronic digital logic circuitry

Exclusive function

With field-effect transistor

C330S253000, C327S109000, C327S111000

Reexamination Certificate

active

07142014

ABSTRACT:
An apparatus and method of the present invention includes a high frequency exclusive OR (XOR) with a peaked load stage. The peaked load stage coupled to the XOR produces a peaked response at a specified frequency of operation. The high frequency XOR comprises a mixer stage comprising first and second transconductance stages coupled to produce a differential output current. The peaked load stage receives the differential output current from the mixer stage and provides increasing impedance at a specified frequency of operation. The peaked load stage includes a pair of peaked load blocks comprising a saturation region peaked load MOSFET and a resistive load. The gate-to-source capacitance of the peaked load MOSFET is coupled to the resistive load to form a high pass filter that provides additional bias to a gate of the peaked load MOSFET that increases the resistance of the peaked load MOSFET at the specified frequency.

REFERENCES:
patent: 5218246 (1993-06-01), Lee et al.
patent: 2004/0227573 (2004-11-01), Soda

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