Analog peak detection circuitry for radio receivers

Details Analog peak detection circuitry for radio receivers Analog peak detection circuitry for radio receivers

2006-09-19

2006-09-19

Vo, Nguyen T. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S245100, C455S250100, C375S345000, C327S059000, C327S359000, C330S253000

Reexamination Certificate

active

07110736

ABSTRACT:
A receiver portion of a radio includes an analog circuit for determining a peak amplitude in a way that eliminates or reduces the effects of frequency errors that are introduced by crystals within filters and other devices. A voltage follower and a current mirror in which a MOSFET coupled to an output node produces a voltage across its gate to source terminals whose value is a function of a sum of the gate to source voltages of two MOSFET devices that receive a logarithm of an I modulated channel and a logarithm of a Q modulated channel, respectively.

REFERENCES:
patent: 6442380 (2002-08-01), Mohindra
patent: 6510188 (2003-01-01), Isaksen et al.
patent: 6873832 (2005-03-01), Shi
patent: 2003/0181175 (2003-09-01), Darabi
patent: 2003/0181179 (2003-09-01), Darabi
patent: 2004/0070457 (2004-04-01), Dupuis

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