Communications: electrical – Land vehicle alarms or indicators
Patent
1986-04-30
1988-07-19
Ng, Jin F.
Communications: electrical
Land vehicle alarms or indicators
379345, H04B 158
Patent
active
047588225
ABSTRACT:
A bidirectional amplifier for use in a transmission line, that utilizes a pair of interconnected bridge circuits including isolation transformers and a pair of unidirectional amplifiers. The transmission in each direction uses a single amplifier to amplify the signal for a particular direction of transmission without effecting the other amplifier.
REFERENCES:
patent: 2496266 (1950-02-01), Brode et al.
patent: 3711660 (1973-01-01), Cherry
patent: 3855431 (1974-12-01), Stewart
patent: 3934099 (1976-01-01), Elder, Jr.
patent: 4163878 (1979-08-01), Hashemi
patent: 4358643 (1982-11-01), Levy
"Electronic Instrumentation and Measurement Techniques", W. Cooper, Prentice-Hall, Inc., New Jersey, 1978, pp. 179-197.
Greaby Robert D.
Montgomery Hugh S.
Black Robert J.
Doktycz Charles A.
GTE Communication Systems Corporation
Ng Jin F.
Vaas R.
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