Digital temperature compensation type piezoelectric oscillator
专利汇可以提供Digital temperature compensation type piezoelectric oscillator专利检索，专利查询，专利分析的服务。并且PURPOSE: To prevent the adverse effect of noise generated at the time of controlling an oscillating frequency from giving onto an external electronic device by adjusting a timing controlling the oscillating frequency of a piezoelectric oscillator circuit with use of a frequency control signal, with a frequency control timing adjustment signal from the outside of a digital temperature compensation piezoelectric oscillator.
CONSTITUTION: A frequency control variable (c) in a temperature data (b) is outputted to a read only memory (PROM) 4 and the fact of completion of output preparation and availability of frequency control is informed to a timing controller 7. The timing controller 7 detects a trailing edge of a frequency control timing adjustment signal (a) from 'H' to 'L' and outputs a signal (e) outputting a frequency control signal (f) to a latch circuit 5 upon the notice of the end of the reception of an external electronic device and in the state of halt. Upon the receipt of the signal (e), the latch circuit 5 outputs the frequency control signal (f) to a piezoelectric oscillation circuit 11 to control the oscillating frequency to be stable against temperature. Thus, adverse effect of FM noise and PM noise caused when the frequency is controlled is evaded.
COPYRIGHT: (C)1991,JPO&Japio，下面是Digital temperature compensation type piezoelectric oscillator专利的具体信息内容。
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