Arrangement for comparing two temporally separated bursts of sig

Details Arrangement for comparing two temporally separated bursts of sig Arrangement for comparing two temporally separated bursts of sig

1993-05-21

1996-07-02

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342 47, 342413, 342410, 364451, G01S 104

Patent

active

055327010

ABSTRACT:
A comparator circuit compares two temporally separated input bursts of signals which occur at two different frequencies. The first burst is an interrogation pulse and the second burst is a reply pulse in a DME system. The comparator circuit includes a first frequency converter (CO1) for receiving at an input thereof the two input bursts, and a comparing device (DC) connected to receive an output of the first frequency converter (CO1). In order to reduce the measurement errors, the first frequency converter (CO1) receives at the input thereof the two input bursts and converts them into two new bursts of signals that have a common frequency so that the comparing device (DC) can carry out the comparison at the common frequency.

REFERENCES:
patent: 3321760 (1963-09-01), Lipsey
patent: 4333081 (1982-06-01), Hofgen
patent: 4455556 (1984-06-01), Koshio et al.
patent: 4646097 (1987-02-01), King
patent: 4860014 (1989-08-01), Shores et al.
patent: 5163004 (1992-11-01), Rentz
patent: 5339082 (1994-08-01), Norsworthy

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