Electronic unit, especially for detecting living organisms

Communications: electrical – Condition responsive indicating system – Specific condition

Reexamination Certificate

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Details

C340S315000, C340S686100, C340S545300

Reexamination Certificate

active

07636048

ABSTRACT:
A unit having a transmitting antenna (3a) and a receiving antenna (3b) connected through a coupling block (3) to a reference oscillator (1) and to a recording oscillator (2), the reference oscillator (1) is connected to a converter f/U1(4) for measuring and changing frequency of the reference oscillator (1) to a voltage necessary for feedback check of the reference frequency, and to an analogue block (7) for measuring variation of the reference oscillator voltage. The recording oscillator (2) is connected to a converter f/U2(5) for measuring and changing frequency from the detecting oscillator (2) to a voltage necessary for checking the received frequency. Converter f/U1(4), analogue block (7), detecting oscillator (2) and converter f/U2(5) are connected to a digital block (6) for recording, controlling, surveillance and regulating the respective operations and evaluating operation of the respective blocks. The digital block (6) is connected to the reference oscillator (1).

REFERENCES:
patent: 3863240 (1975-01-01), Galvin
patent: 3942178 (1976-03-01), Hackett
patent: 4527151 (1985-07-01), Byrne
patent: 4771789 (1988-09-01), Namekawa
patent: 5576627 (1996-11-01), McEwan
patent: 5861806 (1999-01-01), Vories et al.
patent: 5867257 (1999-02-01), Rice et al.
patent: 5977878 (1999-11-01), Lang
patent: 6336045 (2002-01-01), Brooks
patent: 6898299 (2005-05-01), Brooks
patent: WO 03/090619 (2003-11-01), None

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