Wireless digital communication device, and a peak-detector

Details Wireless digital communication device, and a peak-detector Wireless digital communication device, and a peak-detector

1996-07-18

1999-11-02

Le, Thanh Cong

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455334, 327 59, H04B 116, H03K 5153

Patent

active

059786647

ABSTRACT:
A peak detector that is particularly suitable for measuring the peak value of an RSSI-signal in a digital communication device. The peak detector includes a peak value storage capacitor which is charged by a high current or by a low current. When the RSSI-signal is greater than the output voltage of the peak detector, the storage capacitor is charged with the low current. When the RSSI-signal is substantially greater than the output voltage of the peak detector, the storage capacitor is charged with the high current. Herewith, it is achieved that the peak value of the RSSI-signal is determined quickly, without any overshoot, i.e. the peak value is determined accurately.

REFERENCES:
patent: 4884141 (1989-11-01), Hyakutake
patent: 4910521 (1990-03-01), Mellon
patent: 5471169 (1995-11-01), Dendinger
patent: 5502746 (1996-03-01), Ozguc
patent: 5546027 (1996-08-01), Shinozaki et al.
patent: 5666379 (1997-09-01), Ovard et al.
"Operational Amplifier--Design and Applications", by J.G. Graeme et al, McGraw-Hill, Kogakusha, Ltd., pp. 353-358.

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