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H03L 1/00
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Stabilisation of generator output against variations of physical values, e.g. power supply |
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H03L 1/02
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Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only |
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H03L 1/04
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Constructional details for maintaining temperature constant |
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H03L 3/00
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Starting of generators |
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H03L 5/00
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Automatic control of voltage, current, or power |
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H03L 5/02
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Automatic control of voltage, current, or power of power |
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H03L 7/00
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Automatic control of frequency or phaseSynchronisation |
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H03L 7/02
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Automatic control of frequency or phaseSynchronisation using a frequency discriminator comprising a passive frequency-determining element |
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H03L 7/04
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Automatic control of frequency or phaseSynchronisation using a frequency discriminator comprising a passive frequency-determining element wherein the frequency-determining element comprises distributed inductance and capacitance |
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H03L 7/06
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Automatic control of frequency or phaseSynchronisation using a reference signal applied to a frequency- or phase-locked loop |
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H03L 7/07
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Automatic control of frequency or phaseSynchronisation using a reference signal applied to a frequency- or phase-locked loop using several loops, e.g. for redundant clock signal generation |
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H03L 7/08
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Details of the phase-locked loop |
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H03L 7/10
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Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range |
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H03L 7/12
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Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a scanning signal |
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H03L 7/14
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Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail |
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H03L 7/16
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop |
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H03L 7/18
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop |
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H03L 7/20
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop 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 |
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H03L 7/22
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop |
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H03L 7/23
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop with pulse counters or frequency dividers |
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H03L 7/24
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Automatic control of frequency or phaseSynchronisation using a reference signal directly applied to the generator |
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H03L 7/26
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Automatic control of frequency or phaseSynchronisation using energy levels of molecules, atoms, or subatomic particles as a frequency reference |
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H03L 7/081
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Details of the phase-locked loop provided with an additional controlled phase shifter |
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H03L 7/083
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Details of the phase-locked loop the reference signal being additionally directly applied to the generator |
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H03L 7/085
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Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal |
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H03L 7/087
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Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using at least two phase detectors or a frequency and phase detector in the loop |
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H03L 7/089
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Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses |
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H03L 7/091
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Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector using a sampling device |
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H03L 7/093
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Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop |
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H03L 7/095
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Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using a lock detector |
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H03L 7/097
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Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using a comparator for comparing the voltages obtained from two frequency to voltage converters |
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H03L 7/099
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Details of the phase-locked loop concerning mainly the controlled oscillator of the loop |
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H03L 7/107
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Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth |
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H03L 7/113
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Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using frequency discriminator |
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H03L 7/181
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a numerical count result being used for locking the loop, the counter counting during fixed time intervals |
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H03L 7/183
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number |
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H03L 7/185
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using a mixer in the loop |
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H03L 7/187
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using means for coarse tuning the voltage controlled oscillator of the loop |
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H03L 7/189
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using means for coarse tuning the voltage controlled oscillator of the loop comprising a D/A converter for generating a coarse tuning voltage |
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H03L 7/191
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using at least two different signals from the frequency divider or the counter for determining the time difference |
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H03L 7/193
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider |
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H03L 7/195
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number in which the counter of the loop counts between two different non zero numbers, e.g. for generating an offset frequency |
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H03L 7/197
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop 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 |
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H03L 7/199
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Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop 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 with reset of the frequency divider or the counter, e.g. for assuring initial synchronisation |
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H03L 9/00
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Automatic control not provided for in other groups of this subclass |
