Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1976-11-11
1978-09-26
Yusko, Donald J.
Communications: electrical
Condition responsive indicating system
Specific condition
325186, 331107G, 343 5PD, G01S 942, G08B 1324
Patent
active
041174640
ABSTRACT:
Microwave apparatus for detecting the movement of a moving object comprising a Gunn oscillator device having input terminals that are capable of receiving a potential difference which serves to produce a bias current in the device, said potential difference being subject to variations, the device being responsive to a constant potential difference and operative to radiate microwave energy at a first frequency, and further responding to Doppler shifted energy reflected from the moving object and producing a variation in the bias current, an operational amplifier responsive to the potential difference and a reference signal for developing a first signal when the potential difference exceeds the reference signal and a second signal when it is less, a series-pass transistor connected to a source of DC potential and the operational amplifier and being switchable between a conducting and a non-conducting state in response to the first and second signals and serving to maintain the potential difference at a constant value, and a resistive element connected between an output of the transistor and the Gunn oscillator for sensing the variation in the bias current and developing an output signal representative of the movement of the moving object.
REFERENCES:
patent: 3691556 (1972-09-01), Bloice
patent: 3697989 (1972-10-01), Bailey et al.
patent: 3731307 (1973-05-01), Charlot, Jr.
patent: 3733551 (1973-05-01), Augenblick et al.
patent: 3946503 (1976-03-01), Whitman
Nowicki Joseph E.
Solfan Systems, Inc.
Yusko Donald J.
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