High frequency signal detector

Details High frequency signal detector High frequency signal detector

1996-09-23

1999-08-10

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

324627, 340661, G08B 2100

Patent

active

059365374

ABSTRACT:
A micro-power, micro-size RF detector is suitable for implementation on an integrated circuit. The detector is used for detecting the presence of high frequency AC signals on a transmission line which has a transmission line impedance. An input for connection to the transmission line through a high impedance relative to the transmission line is provided. A current mode detector is coupled to the input. The current mode detector translates AC signals on the input to a bias signal having a DC component determined by power of the AC signal on the transmission line. A current mode amplifier is coupled to the current mode detector, and amplifies the bias signal to produce a detector current. A binary output driver is coupled to the current mode amplifier, which generates a binary signal having one binary level if the detector current exceeds a high signal threshold, and another binary level if the detector current falls below a low signal threshold.

REFERENCES:
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patent: 4135152 (1979-01-01), Stuchly et al.
patent: 4471355 (1984-09-01), Hardy et al.
patent: 4983955 (1991-01-01), Ham, Jr. et al.
patent: 5267231 (1993-11-01), Dzieduszko
patent: 5552715 (1996-09-01), Rogers
patent: 5561605 (1996-10-01), Zuercher et al.

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