Patent classifications
H
ELECTRICITY
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H03
ELECTRONIC CIRCUITRY
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H03L
AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
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7/00
Automatic control of frequency or phase; Synchronisation
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H03L7/06
using a reference signal applied to a frequency- or phase-locked loop
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H03L7/08
Details of the phase-locked loop
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H03L7/14
for assuring constant frequency when supply or correction voltages fail
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H03L7/143
by switching the reference signal of the phase-locked loop
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