by combining signals additively or in product demodulators

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Demodulation of angle-modulated oscillations > by detecting phase difference between two signals obtained from input signal > by combining signals additively or in product demodulators

CPC:

Demodulation of angle-, modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence) > by detecting phase difference between two signals obtained from input signal (H03D3/28 - H03D3/32 take precedence; ; limiting arrangements H03G11/00) > by combining signals additively or in product demodulators

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

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H03D 3/08 by means of diodes, e.g. Foster-Seeley discriminator IPC+CPC Available in IPC and CPC
H03D 3/12 by means of discharge tubes having more than two electrodes IPC+CPC Available in IPC and CPC
H03D 3/14 by means of semiconductor devices having more than two electrodes IPC+CPC Available in IPC and CPC
H03D 3/16 by means of electromechanical resonators IPC+CPC Available in IPC and CPC