Oscillators – Shock excited resonant circuit – With keying means of the active element type
Reexamination Certificate
2007-07-31
2010-02-23
Pascal, Robert (Department: 2817)
Oscillators
Shock excited resonant circuit
With keying means of the active element type
C331S167000, C342S042000, C342S051000, C327S596000
Reexamination Certificate
active
07667548
ABSTRACT:
An oscillation maintenance circuit for a half-duplex transponder that has an LC resonant circuit, a storage capacitor and a rectifier connected to charge the storage capacitor with a rectified oscillation signal, having an end-of-burst detector providing an end-of-burst signal when the amplitude of the oscillation signal has dropped below a predetermined threshold. A clock regenerator provides a clock signal derived from the oscillation signal. Switching means controlled by the clock signal in the presence of the end-of-burst signal connect the storage capacitor with LC resonant circuit through at least one current limiting resistor during part of the period of the clock signal, in such a manner that energy is fed into the LC resonant circuit.
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Brady III Wade J.
Gannon Levi
Kempler William B.
Pascal Robert
Telecky , Jr. Frederick J.
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