Mixer circuits and methods with improved spectral purity

Details Mixer circuits and methods with improved spectral purity Mixer circuits and methods with improved spectral purity

2007-09-18

2007-09-18

Chang, Joseph (Department: 2817)

Oscillators

Beat frequency

Frequency or amplitude adjustment or control

C327S359000, C455S323000

Reexamination Certificate

active

11106902

ABSTRACT:
Embodiments of the present invention include mixer circuits and methods with improved spectral purity. In one embodiment the present invention includes a mixer circuit comprising a first transistor having a gate, a source and a drain, a second transistor having a gate, a source and a drain, a first capacitance coupled between the source of the first transistor and the source of the second transistor and a bias circuit having an input, a first output coupled to the source of the first transistor and a second output coupled to the source of the second transistor. The present invention may be advantageously used in a wireless transmitter application.

REFERENCES:
patent: 7092692 (2006-08-01), Tan et al.
patent: 2002/0047735 (2002-04-01), Grasset et al.
patent: 2003/0216131 (2003-11-01), Kovacevic et al.
patent: 2006/0055461 (2006-03-01), Lee et al.

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