a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

Full Title

Automatic control of frequency or phase; Synchronisation > using a reference signal applied to a frequency- or phase-locked loop > 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 (H03L7/20, H03L7/22 take precedence) > a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

Child Classifications

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• H03L 7/185 using a mixer in the loop (H03L7/187 - H03L7/195 take precedence)
• H03L 7/187 using means for coarse tuning the voltage controlled oscillator of the loop (H03L7/191 - H03L7/195 take precedence)
• H03L 7/191 using at least two different signals from the frequency divider or the counter for determining the time difference (H03L7/193, H03L7/195 take precedence)
• H03L 7/193 the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider
• H03L 7/195 in which the counter of the loop counts between two different non zero numbers, e.g. for generating an offset frequency (H03L7/193 takes precedence)