Gilbert mixers with improved isolation

Details Gilbert mixers with improved isolation Gilbert mixers with improved isolation

2011-08-09

2011-08-09

Trinh, Sonny (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S285000, C455S302000, C455S313000

Reexamination Certificate

active

07995983

ABSTRACT:
The employment of cascading in connection with improving mixer isolation in a Gilbert mixer circuit. In this vein, there is broadly contemplated herein, inter alia, the provision of a mixer suitable for use in a direct-conversion radio receiver operating in the 57-64 GHz industrial, scientific, and medical (ISM) band. Such a receiver may be integrated along with a transmitter entirely on a silicon integrated circuit and can be used to receive and transmit data signals in such applications as wireless personal-area networks (WPANs). Numerous other applications, of course, are available for a mixer with improved LO-to-RF isolation, particularly at millimeter-wave frequencies where high LO-to-RF isolation is difficult to achieve.

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Gilbert, Barrie, “The Micromixer: A Highly Linear Variant of the Gilbert Mixer Using a Bisymmetric Class-AB Input Stage”, IEEE Journal of Solid-State Circuits, vol. 32, No. 9, pp. 1412-1423, Sep. 1997.
Gilbert, Barrie, “A Precise Four-Quadrant Multiplier with Subnanosecond Response”, IEEE Journal of Solid-State Circuits, vol. SC-3, No. 4, pp. 365-373, Dec. 1968.

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