KR830000467A - Frequency control device - Google Patents

Abstract

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Description

Frequency control device

This content is subject to disclosure, so the full text is not included.

1 is a block diagram of a frequency control apparatus according to a first embodiment of the present invention.

Figure 2 is an inverter circuit diagram of Figure 1.

Figure 3 is a divider circuit diagram of Figure 1.

Figure 4 is a circuit diagram of the up-down counter.

Figure 5 is a circuit diagram of the D-f converter and comparator of Figure 1.

6 and 7 are waveform diagrams of each part of FIG. 5;

Fig. 8 is a waveform diagram showing an example of circuit control.

9 is a block diagram showing a second embodiment of the present invention.

Claims (1)

It is coupled to a frequency setter that transmits a set digital signal corresponding to the set frequency and is counted up or counted by a digital-frequency converter that converts the set digital signal into a frequency signal and an up or down signal from a comparator. It has a divider control terminal that combines the up-down counter that generates a down count digital signal and the output terminal of the up-down counter, and transmits the divided output frequency while the input frequency is determined by the count digital signal. In a load device coupled to the output of the cycle or the output of the divider, a converter is coupled to one comparison input terminal of the frequency signal detection device that detects a signal having a frequency corresponding to the output frequency of the divider, and the other comparison input terminal The output terminal of the frequency signal detection device is coupled to the comparator that generates the frequency comparison output of the converter output frequency and the output frequency of the detection device, and the up-down counter operation speed control connected between the output terminal of the comparator and the input terminal of the up-down counter. Frequency control device made in circuit. ※ Note: It is disclosed according to the contents of the initial application.