Envelope detection circuit for low power communication systems

Details Envelope detection circuit for low power communication systems Envelope detection circuit for low power communication systems

2007-09-11

2007-09-11

Urban, Edward F. (Department: 2618)

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

C455S226200, C455S067110

Reexamination Certificate

active

10912619

ABSTRACT:
An envelope detection circuit includes a signal rectifier, first and second capacitors, and first, second and third transistors. The signal rectifier includes an input port coupled to receive a modulated input signal, and an output port. The first capacitor has a first port coupled to the output port of the signal rectifier and a second port for coupling to a signal ground. The first transistor has a first port coupled to the output port of the signal rectifier, a second port for coupling to a signal ground, and a control port. The second transistor has a first port for coupling to a power supply, a second port, and a control port coupled to the output of the signal rectifier. The third transistor has a first port coupled to second port of the second transistor, a second port for coupling to a signal ground, and a control port. The second capacitor has a first port coupled to first port of the third transistor, and a second port for coupling to a signal ground.

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