Peak and valley signal measuring circuit using single digital-to

Details Peak and valley signal measuring circuit using single digital-to Peak and valley signal measuring circuit using single digital-to

1995-05-12

1996-09-10

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455316, 324103P, 327 58, 327 62, 341132, H04B 1700

Patent

active

055554520

ABSTRACT:
A peak and valley measuring circuit (40) featuring a single digital-to-analog converter (DAC) (100), a peak counter (110), a valley counter (120), and a comparator (130). The peak and valley measuring circuit (40) uses the peak counter (110) when detecting peaks of the recovered audio signal and the valley counter (120) when detecting valleys of the recovered audio signal. The DAC (100) is used in conjunction with one of the counters (110) or (120) depending on whether peaks or valleys are being detected, and is preferably a current-mode DAC.

REFERENCES:
patent: 4165508 (1979-08-01), Barter
patent: 4631737 (1986-12-01), Davis et al.
patent: 4827191 (1989-05-01), Chapman
patent: 4866261 (1989-09-01), Pace
patent: 5025251 (1991-06-01), Mittel et al.
patent: 5027117 (1991-06-01), Yoshida et al.
patent: 5263195 (1993-11-01), Panther et al.
patent: 5287063 (1994-02-01), Izawa
patent: 5394441 (1995-02-01), Motera et al.

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