H03D

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DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER (masers, lasers H01S; circuits capable of acting both as modulator and demodulator H03C; details applicable to both modulators and frequency-changers H03C; demodulating pulses H03K 9/00; transforming types of pulse modulation H03K 11/00; coding, decoding or code conversion, in general H03M; repeater stations H04B 7/14; demodulators adapted for digitally modulated-carrier systems H04L 27/00; synchronous demodulators adapted for colour television H04N 9/66)

Subclasses

SubclassTitle
1/00 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence)
1/02 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) Details
1/04 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) Details Modifications of demodulators to reduce interference by undesired signals
1/06 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) Details Modifications of demodulators to reduce distortion, e.g. by negative feedback
1/08 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of non-linear two-pole elements (H03D 1/22, H03D 1/26, H03D 1/28 take precedence)
1/10 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of non-linear two-pole elements (H03D 1/22, H03D 1/26, H03D 1/28 take precedence) of diodes
1/12 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of non-linear two-pole elements (H03D 1/22, H03D 1/26, H03D 1/28 take precedence) of diodes with provision for equalising ac and dc loads
1/14 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of non-linear elements having more than two poles (H03D 1/22, H03D 1/26, H03D 1/28 take precedence)
1/16 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of non-linear elements having more than two poles (H03D 1/22, H03D 1/26, H03D 1/28 take precedence) of discharge tubes
1/18 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of non-linear elements having more than two poles (H03D 1/22, H03D 1/26, H03D 1/28 take precedence) of semiconductor devices
1/20 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of non-linear elements having more than two poles (H03D 1/22, H03D 1/26, H03D 1/28 take precedence) with provision for preventing undesired type of demodulation, e.g. preventing anode detection in a grid detection circuit
1/22 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) Homodyne or synchrodyne circuits
1/24 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) Homodyne or synchrodyne circuits for demodulation of signals wherein one sideband or the carrier has been wholly or partially suppressed
1/26 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by means of transit-time tubes
1/28 Demodulation of amplitude-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by deflecting an electron beam in a discharge tube (H03D 1/26 takes precedence)
3/00 Demodulation of angle-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence)
3/02 Demodulation of angle-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by detecting phase difference between two signals obtained from input signal (H03D 3/28-H03D 3/32 take precedence; limiting arrangements H03G 11/00)
3/04 Demodulation of angle-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by detecting phase difference between two signals obtained from input signal (H03D 3/28-H03D 3/32 take precedence; limiting arrangements H03G 11/00) by counting or integrating cycles of oscillations
3/06 Demodulation of angle-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by detecting phase difference between two signals obtained from input signal (H03D 3/28-H03D 3/32 take precedence; limiting arrangements H03G 11/00) by combining signals additively or in product demodulators
3/08 Demodulation of angle-modulated oscillations (H03D 5/00, H03D 9/00, H03D 11/00 take precedence) by detecting phase difference between two signals obtained from input signal (H03D 3/28-H03D 3/32 take precedence; limiting arrangements H03G 11/00) by combining signals additively or in product demodulators by means of diodes, e.g. Foster-Seeley discriminator

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