| 摘要 |
An active linear discriminator circuit having a transformer with a center-tapped primary and two center-tapped secondaries tuned on opposite sides of a desired center frequency, each tuned secondary output being demodulated to direct current (D.C.) levels applied across respective resistor and capacitor networks to produce a zero output when the input frequency is the desired center frequency and to produce positive and negative outputs in opposite relation proportional to input deviation above or below the center frequency.
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