by detecting phase difference between two signals obtained from input signal (H03D3/28 - H03D3/32 take precedence; ; limiting arrangements H03G11/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: by detecting phase difference between two signals obtained from input signal

CPC: by detecting phase difference between two signals obtained from input signal (H03D3/28 - H03D3/32 take precedence; ; limiting arrangements H03G11/00)

Full Title

Full titles differ between systems:

IPC:

Demodulation of angle-modulated oscillations > by detecting phase difference between two signals obtained from input signal

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)

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

Child Classifications

Navigate with arrow keys, Enter to open

H03D 3/04 by counting or integrating cycles of oscillations IPC+CPC Available in IPC and CPC
H03D 3/06 by combining signals additively or in product demodulators IPC+CPC Available in IPC and CPC
H03D 3/18 by means of synchronous gating arrangements IPC+CPC Available in IPC and CPC
H03D 3/22 by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector IPC+CPC Available in IPC and CPC
H03D 3/24 Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits +1 CPC IPC+CPC Available in IPC and CPC