Peak detector circuit for FM measuring apparatus

Details Peak detector circuit for FM measuring apparatus Peak detector circuit for FM measuring apparatus

1986-07-21

1988-04-12

Laroche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

328117, 328135, H03D 110, H03K 524

Patent

active

047377305

ABSTRACT:
A peak detector circuit comprises a peak detecting diode circuitry for detecting peaks in an input FM demodulated signal, a capacitor connected to the output of the diode circuitry, a first resistor connected in parallel with the capacitor, and an amplifier connected to the output of the diode circuitry and having a high input impedance. A second resistor is connected to the first resistor in parallel therewith through a turn-on/off switch for discharging and subsequently charging the capacitor within a short time in response to detection of decreasing in the level of the input FM demodulated signal.

REFERENCES:
patent: 3508158 (1970-04-01), Marchese
patent: 4432235 (1984-02-01), Renzel et al.

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