Zener diode detector circuit

Details Zener diode detector circuit Zener diode detector circuit

1989-07-17

1991-07-09

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307318, 307494, 328 26, 328 28, H03K 500, H03K 326, G06G 712

Patent

active

050308467

ABSTRACT:
A rectifier circuit comprises two Zener diodes (3,4) having substantially the same characteristic Zener voltage which are connected to receive a sinusoidal input signal via a low impedance buffer (8). A half-wave rectified signal appearing on line (17) has a DC bias equal to the Zener voltage which is removed by the operational amplifier (15). A low pass filter (20) provides a smoothed DC voltage output on line (21). The circuit may be used as an AC to DC converter or for the detection of signals ranging from several volts down to a few millivolts. Its linear response over a wide dynamic range and at small signal levels is an advantage over conventional silicon diode rectifier circuits which suffer distortion at low signal levels.

REFERENCES:
patent: 4647861 (1987-03-01), Petritis et al.
patent: 4665372 (1987-05-01), Schwartz

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