Method and apparatus for detecting a peak value of an analog sig

Details Method and apparatus for detecting a peak value of an analog sig Method and apparatus for detecting a peak value of an analog sig

Filed on

1978-02-28

Date issued

1979-08-21

Examiner

Morrison, Malcolm A.

Patent Class

Communications: electrical

SubClass

Audible indication

SubSubClass

Percussion-type sound producer

Other Related Categories

324103P, 307351, 235 92CA, H03K 1302

Type

Patent

Status

active

Patent number

041655087

Description

ABSTRACT:
Apparatus for detecting a peak value of an analog signal includes a first counter for counting pulses from a digital clock for successive samplings of the analog signal to convert each sample of the analog signal into digital form and a counting register into which the pulse count in the first counter is transferred to be recounted at a later sampling. With a prior digital count in the register, the digital clock simultaneously (1) increments the counter to count the current signal sampling and (2) decrements the register to zero to recount the prior signal sampling. The counter is constrained to count up until both counting and recounting steps are complete before the count in the counter is transferred to the register. In this manner the counter will always attain the greater of the current and the prior sampling pulse count values and this maximum value will always be transferred into the register. A peak is signaled when the prior maximum pulse count exceeds current pulse counts for a predetermined number of successive samplings.

REFERENCES:
patent: 3412241 (1968-11-01), Spence et al.
patent: 3808407 (1974-04-01), Ratz
patent: 3878984 (1975-04-01), Sotiropoulos et al.
patent: 3924078 (1975-12-01), Bussey
patent: 3973197 (1976-08-01), Meyer
patent: 4011509 (1977-03-01), Edwards

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