IPC-Stelle: H03L 7/26 [Version 2017.01]

SymbolTypTitel
HSKELECTRICITY
H03KLBASIC ELECTRONIC CIRCUITRY
H03LUKLAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES (of dynamo-electric generators H02P) [3]
H03L 1/00HGRStabilisation of generator output against variations of physical values, e.g. power supply (automatic control H03L 5/00, H03L 7/00) [3, 2006.01]
H03L 1/02UGR1
.against variations of temperature only [3, 2006.01]
H03L 1/04UGR2
. .Constructional details for maintaining temperature constant [3, 2006.01]
H03L 3/00HGRStarting of generators [3, 2006.01]
H03L 5/00HGRAutomatic control of voltage, current, or power [3, 2006.01]
H03L 5/02UGR1
.of power [3, 2006.01]
H03L 7/00HGRAutomatic control of frequency or phase; Synchronisation (tuning of resonant circuits in general H03J; synchronising in digital communication systems, see the relevant groups in class H04) [3, 2006.01]
H03L 7/02UGR1
.using a frequency discriminator comprising a passive frequency-determining element [3, 2006.01]
H03L 7/04UGR2
. .wherein the frequency-determining element comprises distributed inductance and capacitance [3, 2006.01]
H03L 7/06UGR1
.using a reference signal applied to a frequency- or phase-locked loop [3, 2006.01]
H03L 7/07UGR2
. .using several loops, e.g. for redundant clock signal generation (for indirect frequency synthesis H03L 7/22) [5, 2006.01]
H03L 7/08UGR2
. .Details of the phase-locked loop [3, 2006.01]
H03L 7/081UGR3
. . .provided with an additional controlled phase shifter [5, 2006.01]
H03L 7/083UGR3
. . .the reference signal being additionally directly applied to the generator (direct frequency synchronisation without loop H03L 7/24) [5, 2006.01]
H03L 7/085UGR3
. . .concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal (H03L 7/10 takes precedence; frequency or phase detection comparison in general H03D 3/00, H03D 13/00) [5, 2006.01]
H03L 7/087UGR4
. . . .using at least two phase detectors or a frequency and phase detector in the loop [5, 2006.01]
H03L 7/089UGR4
. . . .the phase or frequency detector generating up-down pulses (H03L 7/087 takes precedence) [5, 2006.01]
H03L 7/091UGR4
. . . .the phase or frequency detector using a sampling device (H03L 7/087 takes precedence) [5, 2006.01]
H03L 7/093UGR4
. . . .using special filtering or amplification characteristics in the loop (H03L 7/087-H03L 7/091 take precedence) [5, 2006.01]
H03L 7/095UGR4
. . . .using a lock detector (H03L 7/087 takes precedence) [5, 2006.01]
H03L 7/097UGR4
. . . .using a comparator for comparing the voltages obtained from two frequency to voltage converters [5, 2006.01]
H03L 7/099UGR3
. . .concerning mainly the controlled oscillator of the loop [5, 2006.01]
H03L 7/10UGR3
. . .for assuring initial synchronisation or for broadening the capture range [3, 2006.01]
H03L 7/107UGR4
. . . .using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth [5, 2006.01]
H03L 7/113UGR4
. . . .using frequency discriminator [5, 2006.01]
H03L 7/12UGR4
. . . .using a scanning signal (tuning circuits with automatic scanning over a band of frequencies H03J 7/18) [3, 2006.01]
H03L 7/14UGR3
. . .for assuring constant frequency when supply or correction voltages fail [3, 2006.01]
H03L 7/16UGR2
. .Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop [3, 2006.01]
H03L 7/18UGR3
. . .using a frequency divider or counter in the loop (H03L 7/20, H03L 7/22 take precedence) [3, 2006.01]
H03L 7/181UGR4
. . . .a numerical count result being used for locking the loop, the counter counting during fixed time intervals [5, 2006.01]
H03L 7/183UGR4
. . . .a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number [5, 2006.01]
H03L 7/185UGR5
. . . . .using a mixer in the loop (H03L 7/187-H03L 7/195 take precedence) [5, 2006.01]
H03L 7/187UGR5
. . . . .using means for coarse tuning the voltage controlled oscillator of the loop (H03L 7/191-H03L 7/195 take precedence) [5, 2006.01]
H03L 7/189UGR6
. . . . . .comprising a D/A converter for generating a coarse tuning voltage [5, 2006.01]
H03L 7/191UGR5
. . . . .using at least two different signals from the frequency divider or the counter for determining the time difference (H03L 7/193, H03L 7/195 take precedence) [5, 2006.01]
H03L 7/193UGR5
. . . . .the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider (pulse counters/frequency dividers H03K 21/00-H03K 29/00) [5, 2006.01]
H03L 7/195UGR5
. . . . .in which the counter of the loop counts between two different non zero numbers, e.g. for generating an offset frequency (H03L 7/193 takes precedence; pulse counters for predetermined counting H03K 21/00-H03K 29/00) [5, 2006.01]
H03L 7/197UGR4
. . . .a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division [5, 2006.01]
H03L 7/199UGR5
. . . . .with reset of the frequency divider or the counter, e.g. for assuring initial synchronisation [5, 2006.01]
H03L 7/20UGR3
. . .using a harmonic phase-locked loop, i.e. a loop which can be locked to one of a number of harmonically related frequencies applied to it (H03L 7/22 takes precedence) [3, 2006.01]
H03L 7/22UGR3
. . .using more than one loop [3, 2006.01]
H03L 7/23UGR4
. . . .with pulse counters or frequency dividers [5, 2006.01]
H03L 7/24UGR1
.using a reference signal directly applied to the generator [3, 2006.01]
H03L 7/26UGR1
.using energy levels of molecules, atoms, or subatomic particles as a frequency reference [3, 2006.01]
H03L 9/00HGRAutomatic control not provided for in other groups of this subclass [2006.01]