JPH029897U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the entire circuit of the world clock according to the present invention, FIG. 2 is a diagram showing an embodiment of the signal output circuit, and FIG. 3 is a diagram showing an example of the circuit of the display clock section.
FIG. 4 is a time chart showing signals of the signal output circuit. 10...Reference clock circuit, 16...Minute counter, 18
...Hour counters 18, 22...Signal output circuit, 24...
Timing control circuit, 36... Auxiliary minute counter circuit, 46... Auxiliary time counter circuit, 56... Minute advance circuit,
70...Timing signal output circuit, 78...Data output circuit, 86...Display clock section.

Claims (1)

[Claims for Utility Model Registration] It has a built-in oscillation circuit that outputs a reference signal and a frequency divider circuit that divides the frequency of the reference signal from the oscillation circuit, and the reference signal frequency-divided by the frequency divider circuit is used as a division counter and a timer. a reference clock circuit that outputs a minute reference signal and an hour reference signal by counting with a counter and also outputs a starter signal of a constant period from the frequency dividing circuit; is input, outputs the hour control signal for the required time based on the timing signal, outputs the minute control signal for the required time when the hour control signal is not output, and outputs the hour control signal or minute control signal. a timing control circuit that maintains the output of the clock signal during the period when the clock signal is being output; At the same time, the value obtained by sequentially adding a predetermined value to the value of the minute counter is also sequentially output as the minute signal of the serial signal, and a minute block signal is output every time the serial signal finishes outputting one value. an auxiliary minute counter circuit that reads the hour reference signal from the hour counter using a start signal, outputs the reference signal as an hour signal that is a serial signal synchronized with the clock signal, and sequentially adds 1 to the value of the hour counter. an auxiliary hour counter circuit that sequentially outputs the added value as the hour signal of the serial signal, and outputs the hour block signal every time the serial signal finishes outputting one value; a timing signal output circuit which receives the minute control signal and the hour control signal and outputs the minute block signal or the hour block signal as a timing signal; and when the minute block signal and the minute control signal are input, the timing signal output circuit a division circuit that outputs a division signal that advances the count value of the counter circuit; and a data output that receives the minute signal, the hour signal, the minute control signal, and the hour control signal, and outputs the hour signal or the minute signal as a data signal. The circuit receives the data signal, the timing signal, and the clock signal, reads a minute signal of a required numerical value from the data signal, and an hour signal of a required numerical value from the data signal using the timing signal, and reads the minute signal from the data signal using the timing signal. A world clock comprising: and a plurality of display clock sections that display the time using hour signals.