H03D3/241 - CPC Classification Index

ClassID:

218991 ⎘

H03D3/241 - CPC Classification

Classification description:

Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal; Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop

Sub-classes:

H03D3/242 » {combined with means for controlling the frequency of a further oscillator, e.g. for negative frequency feedback or AFC} 3
H03D3/244 » {combined with means for obtaining automatic gain control} 4
H03D3/245 » {using at least twophase detectors in the loop } 4
H03D3/247 » {using a controlled phase shifter } 1
H03D3/248 » {with means for eliminating interfering signals, e.g. by multiple phase locked loops } 2

Recent Application in this class:

20220247356

Demodulator and wireless receiver including the same

20190089360

Variable delay

20090316849

Method and system for RF signal generation utilizing a synchronous multi-modulus divider

20090215417

Receiver for amplitude-modulated signals

20090097607

Method and system of detecting and locking to multi-standard video streams

20080317186

Controlling phase locked loop

20080304609

Phase/frequency estimator-based phase locked loop

20080252368

Circuit and method for processing an input signal

20080157868

PLL circuit, phase shifting method, and IC chip

20060255156

Pll circuit, demodulator circuit, ic card, and ic card processing apparatus

20060139107

Oscillation control apparatus

20060132229

Phase demodulator and portable telephone apparatus

20050281366

Burst mode receiver based on charge pump PLL with idle-time loop stabilizer

15590730

Circuit and method for compensating noise