JPS6051671B2 - Electronic clock correction signal generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a correction signal generating device for correcting the time, calendar, alarm functions, etc. of a digital electronic watch.

In recent years, with the advancement of digital electronic watches, a wide variety of functions have been added to the watch functions, and as a result, the operation of the watch has become extremely complicated and the operation time has become longer.

Conventionally, when setting the alarm time on a digital electronic clock, the function is selected using the function selection switch, the correction digit is selected using the correction digit selection switch, and the setting is performed using the setting switch.
A set method was adopted.

In the above setting method, it is necessary to select the J correction digit for each digit, and the selected correction digit is set by pressing the set button multiple times, so the operation is complicated and This required a long set time and made functions such as alarms difficult to use.

However, users have been demanding digital electronic watches with functions that are easy to operate. SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks and to provide an electronic timepiece equipped with a correction device that is simple and easy to operate.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is an external view of the digital electronic watch of the present invention, and 2
0 is a digital electronic clock. 7 is a digital display device;
By operating the function selection button 20b, time contents, calendar contents, and alarm contents are switched and displayed.

In the (N) position, the content of the function selected by the function selection button 20b is normally displayed, and no correction is made even if the user 20c is rotated.

When the rear use 20c is pulled out one step to the (M) position, the function selected by the function selection button 20b is corrected or set, and by rotating the rear use 20c in the forward or reverse direction, it is possible to correct or set the function up or down. A set is made. Figure 2 is similar to that shown in Figure 1.
FIG. 3 is a plan view of a rotary switch controlled by the operation of FIG.
30 is a rotary switch, a rotary shaft 30b is provided on the switch board 30a, a switch piece 30c having two possible contacts S4 and S5 is rotatably attached to this rotary shaft 30b, and the switch board 30a is rotatably attached to the rotary shaft 30b. There are three fixed contacts Sl on the surface of the rotating shaft 30b.
, S2, and S3 are arranged at 120 degree intervals.

The movable contacts S4 and S5 are connected to the power supply level ■DD via the rotating shaft 30b, and the fixed contacts Sl and S2
, S3 are connected to a correction signal generation circuit as described later.

Next, the control operation by the glue user 20c of the rotary switch 30 will be explained.

Now, when the user 20c is rotated in the forward direction, the movable contacts S4 and S5 begin to rotate clockwise around the rotating shaft 30b, and the movable contact S4 and the fixed contact S1 come into contact. The fixed contacts S1, S2, and S3 no longer come into contact with the movable contacts S4 and S5.

When the movable contacts S4 and S5 are further rotated clockwise, the movable contact \ comes into contact with the fixed contact S2. When the movable contacts S4 and S5 further rotate, the fixed contacts Sl and S2 rotate again.
, S3. When the movable contacts S4 and S5 further rotate, the movable contact S4 and the fixed contact S3 come into contact with each other. When the movable contacts S4 and S5 are further rotated by the user 20c, the movable contacts S5
and the fixed contact S1, the movable contact S4 and the fixed contact S2, and the movable contact S5 and the fixed contact S3 successively contact each other.
That is, when the user 20c is rotated in the normal direction, the movable contacts S4 and S5 repeatedly contact the fixed contacts S1, S2, and S3 in this order.

Furthermore, when the user 20c is reversed, the movable contacts S4 and S5 rotate counterclockwise, so the movable contact S4
, S5 and the fixed contacts Sl, S2, S3 are contacted in the following order:
Contact is continuously repeated in the order of Sl, S3, and S2.

The conditions for the rotary switch in the present invention are that the movable contact and the fixed contact have a numerical relationship that does not have a common divisor in order to make contact between the movable contact and the fixed contact sequentially, and the fixed contact If n is the number of movable contacts, n-1 may be used.

In addition, in the case of a limited size such as a wristwatch, n may be set to 3 as in this embodiment, that is, 3 fixed contacts and 2 movable contacts, or n may be set to 4, that is, 4 fixed contacts and 2 movable contacts. 3
It is best to

FIG. 3 is a circuit block diagram of the digital electronic timepiece according to the present invention, and FIG. 4 is a main voltage waveform diagram in the circuit block diagram of FIG. 3. 2 is a crystal oscillator, 3 is a frequency dividing circuit, which inputs the signal from the crystal oscillator 2 and converts the signal to 1Hz.
and outputs a frequency-divided signal of 2K pressure.

Reference numeral 4 denotes a time counter, which is composed of an up/down counter, receives the 1 Hz frequency divided signal from the frequency dividing circuit 3 as input, performs a time measurement operation, and outputs time information of hours, minutes, and seconds.

Reference numeral 5 denotes a calendar counter, which is composed of an up/down counter, performs a counting operation in response to a carry signal from the time counter 4, and outputs calendar information for the year, month, and day.

Reference numeral 21 denotes an alarm memory circuit, which has an up-down counter configuration and outputs hour, minute, and second alarm information, and an alarm matching circuit 22 detects coincidence with the time counter 4 and generates an acoustic drive. A notification sound is outputted by the audio device 25 via the circuit 24.

Reference numeral 23 denotes a function selection circuit, which is composed of a three-stage shift register, and when the function selection button 20b is operated, a function selection switch 20e is operated, and the time function, calendar function, and alarm function are selected from the function selection circuit 23. ,
Function selection signals for TK, CA, and salmon are output, respectively.

Function selection signals TK, CA, from the function selection circuit 23
AL, the information of the time counter 5, calendar counter 5, and alarm memory circuit 21 is selectively displayed on the display device 7 by the display switching circuit 6, and the time counter 4, calendar counter 5, and alarm memory circuit 21 are selected. can be modified or set automatically.

8 is a chattering prevention circuit, and the rotary switch 3
The latch circuit 8 corresponds to the rotating contacts Sl, S2, and S3 of 0.
a, 8d, and 8e are provided.

The latch circuit 8a is composed of a set-reset flip-flop 8c (50R gate 8b), the set terminal of the set-reset flip-flop 8c is connected to the fixed contact S1, and the reset terminal is connected to the fixed contact S2,
S3 is connected via the 0R gate 8b. The latch circuits 8d and 8e also have the same configuration as the latch circuit 8a, and the set terminal of the latch circuit 8d is connected to the fixed contact S2, and the reset terminal is connected to the fixed contacts Sl and S3 via an 0R gate. .

Further, the set terminal of the latch circuit 8e is connected to the fixed contact S3, and the reset terminal is connected to the fixed contacts Sl and S2 via an 0R gate. Next, the chattering prevention circuit 8
Explain the operation.

When the rotary switch 30 is rotated clockwise, the movable contacts S4, S5 of the rotary switch 30 change to the fixed contacts Sl,
It makes contact with S2 and S3, and outputs a "°H" level contact signal in the order of Sl, S2, and S3.

However, in the initial state, when the fixed contact S1 is in contact with the movable contact 4 and outputs a contact signal of ゜゜H level, the set/reset flip-flop 8c of the latch circuit 8a is set and the latch signal A becomes ``H''. Outputs a level signal.

At the same time, the latch circuits 8d and 8e go into a reset state, and the respective latch signals B and C become "L" level. When the rotary switch 30 is rotated, in the next state, all of the contact signals from the fixed contacts Sl, S2, and S3 become open, but the latch circuits 8a and 8
Each latch signal from d and 8e maintains the previous level.

When the rotary switch 30 is further rotated, the fixed contact S
The contact signal of No. 2 becomes "゜H" level, the latch circuit 8d is set, and the latch signal B becomes ゜゜H゛ level, and the latch circuits 8a and 8e are reset, and the latch signal A of the latch circuit 8a becomes ゜゜H゛. Changes from level to 'L' level.

When the rotary switch 30 is further rotated, the fixed contact S
The contact signals from I, S2, and S3 are all opened again, but the latch signals A, B, and C of the latch circuits 8a, 8d, and 8e maintain their previous levels. Then, as the rotary switch 30 further rotates, the fixed contact S
? The point signal goes to the "H" level and the latch signal C from the latch circuit 8e goes to the "H" level, and the latch circuits 8a and 8d are reset, and the latch signals A and B go to the "L" level. Become. Furthermore, the rotary switch 3
0 is rotated and the contact signal of the fixed contact S1 becomes ``H'' level, the latch circuit 8a is set and the latch signal A changes from the 4゜L3゛ level to the ``゜H'' level, and the latch circuits 8d and 8e become Reset and latch signal B
and C are set to the "°L" level.

As described above, by providing latch circuits 8a, 8d, and 8e corresponding to the fixed contacts Sl, S2, and S3 of the rotary switch 30, the chattering prevention circuit 8 responds to the contact signal using the only contact signal from the rotary switch. It has the function of setting a latch circuit that has been set, resetting other latch circuits, maintaining the state until the next contact signal arrives, and at the same time preventing chattering.

The contact signals Sl, S2, and S3 have the voltage waveforms shown in FIG. It is.

20d is a correction signal mode switch provided corresponding to the above-mentioned use 20c, and 9, 10, and 11 are AND gates, and when the latch signals A, B, and C are input, the correction mode switch 20d enables correction. Set. With the above configuration, the user 20c is normally in the (N) position, so the correction mode switch 20d is set to 0F.
In the F state, the switch signal is at the 46L'' level.

Therefore, the AND gates 9, 10, and 11 are closed, and the latch signals A, B, and C are not output. Therefore, even if the user 20c is turned in this state, no correction or setting operation will be performed. Next, when the above-mentioned user 20c is pulled one step to the (M) position, the correction mode switch 20d is turned on and the switch signal becomes "°H".
Open AND gates 9, 10, 11 and latch signals A, B,
It becomes possible to modify by outputting C.

Reference numeral 12 denotes a pulse generator, which uses the latch signal A generated by the chattering prevention circuit 8 in conjunction with the operation of the user 20c as a data input, and receives the 2K signal from the frequency divider circuit 3.
A first D-type flip-flop 12a whose clock input is a frequency-divided signal of
Q) a second D-type flip-flop 12b whose output is a data input and whose clock input is a signal obtained by inverting the 2KHz frequency-divided signal via an inverter 19;
(Q) output of the second D-type flip-flop 12b and the first D-type flip-flop 12a(7) α
It is composed of a NOR gate 12c which receives the Y output and outputs the pulse signal D.

13 and 14 also have the same configuration as the above-mentioned pulse generation circuit 12, and each receives the latch signal B from the above-mentioned chattering prevention circuit 8.
, C, and output pulse signals E and F.

The operation of the pulsing circuit 12 is such that when the latch signal A input through the AND gate 9 becomes "W" level, the first flip-flop 12a of the pulsing circuit 12 is activated.
data input is set, and 2KH from frequency divider circuit 3 is set.
In synchronization with the first fall of the z signal, the (Q) output of the first flip-flop 12a goes to the "W3" level, and the data input of the second flip-flop 12b is set.

Then, the second
The (Q) output of the flip-flop 12b is set to the "゜H" level. By the above operation, the output of the second flip-flop 12b is set to the "゜H" level. (Q) Time span until the output changes to 46W' level, that is, clock signal 2
A pulse signal D having a half period width of KHz is outputted to the output terminal of the 0R gate 12c.

Similarly to the above, each time the latch signals B and C from the chattering prevention circuit 8 are inputted from the pulsing circuits 13 and 14, a half cycle of the 2K voltage signal synchronized with the 2KHz signal from the frequency dividing circuit 3 is inputted. Pulse signals E and F corresponding to the number of minutes are output.

The pulsing circuits 12, 13, and 14 and the chattering prevention circuit 8 constitute a waveform shaping circuit that eliminates chattering of the contact signal caused by the rotary switch 30 and generates a synchronizing pulse.

15 is a direction detection circuit, and the pulse generation circuit 12,1
Three set/reset flip-flops (hereinafter abbreviated as RS-FF) 16, 17, which are provided corresponding to 3, 14,
It consists of 18.

The pulse signal D from the pulse generator 12 is input to the set terminal of the RS-FF16, the pulse signal F from the pulse generator 14 is input to the reset terminal, and the output terminals Q, 6 The output signal Pl6 is outputted to the inverting output terminal Q; and the output signal ζ is outputted to the inverted output terminal Q. Also, the pulse signal E from the pulse generator 13 is inputted to the set terminal of RS-FFl7, and the pulse signal E is inputted to the reset terminal. The pulse signal D from the pulsing circuit 12 is inputted, the output signal Pl7 is outputted to the output terminal Ql7, and the output signal stop is outputted to the inverting output terminal Q,7.

Furthermore, the set terminal of RS-FFl8 has a pulse generator 1.
The pulse signal F from 4 is input, and the pulse signal E from the pulse generator 13 is input to the reset terminal.
An output signal P, 8 is applied to the output terminal Ql8, and an output signal OFF is applied to the inverted output terminal 0. 26 is a first correction signal gate group, which includes three AND gates 26a,
It consists of 26b, 26c and an 0R gate 26d.

Further, output terminals Ql6, Ql7, Ql8 of the RS-FFl6, l7, l8 are connected to one input terminal of the AND gates 26a, 26b, 26c, respectively, and a pulse generator circuit is connected to the other input terminal of the AND gates 26a, 26b, 26c. The output terminals from 13, 14, and 12 are connected, and the N1 gate 26
By connecting the output terminals of a, 26b, and 26c to the input terminal of the 0R gate 26d, the addition correction signal X is output from the output terminal of the 0R gate 26d. 27 is the second
is a group of modified signal gates, including three AND gates 27a.
, 27b, 27c and an 0R gate 27d.

One input terminal of each AMD gate 27a, 27b, 27c is connected to the inverted output terminal O;, QJ, σ; from the RS-FFl6, l7, l8, respectively, and the other input terminal is connected to a pulse generator, respectively. Output terminals from 13, 14, and 12 are connected, and AND gates 27a and 2
Since each output terminal of 7b and 27c is connected to the input terminal of the 0R gate 27d, the subtraction correction signal Y is output from the output terminal of the 0R gate 26d. Next, the operation of the correction signal generating device in the above configuration will be explained.

As an initial condition, RS-FFl6 is reset, RS-FF
l7 and l8 are in the set state, and in this state, when the user 20c is rotated in the normal direction, the pulse signals D, E, and F are output in order from the waveform shaping circuit, and the pulse signal D that comes first outputs the pulse signals D, E, and F. Then, RS-FFl6 is set, output signal Pl6 of "°H" level is output from output terminal Ql6, AND gate 26a of first correction signal gate group 26 is opened, and the output signal Pl8 of RS-FFl8 is opened. The addition correction signal X is outputted from the output terminal of the 0R gate 26d through the AND gate 26c which had been turned on.
Also, at this time, the RS-FF17 is reset by the pulse signal D, and a high level signal is output from the inverted output terminal σ, which opens the high gate 27d of the second correction gate group 27. The corresponding pulse signal F is not output, and the subtraction correction signal Y is not output.

Next, when the pulse signal E is output, the RS-FF
17 is set, the output signal Pl7 of "H" level is output from the output terminal Ql7, and the AND gate 26b of the first correction signal gate group 26 is opened, and the pre-mortem gate S-
Said A opened by the output signal Pl6 of FFl6
The addition correction signal x is output from the output terminal of the 0R gate 26d through the ND gate 26a.

Furthermore, at this time, the pulse signal E causes the RS-FFl8 to
will be reset. As the RS-FF18 is reset, an output signal of "゜H" level is output to the inverted output terminal Q; and the second AND gate 27c is opened, but since the corresponding pulse signal D does not come, it is subtracted. Correction signal Y
is not output. Next time pulse signal F comes, is it a front whistle? S
-FFl8 is set, and output signal Pl8 of "H" level is output from output terminal Ql8, opens N1 gate 26c of first correction signal gate group 26, and RS-FFl8 is set.
The addition correction signal x is output from the output terminal of the 0R gate 26d through the AND gate 26b opened by the output signal Pl6 of 7. Also, at this time, the pulse signal F causes R
The S-FFl6 is reset and outputs an inverted output signal stop at the ゜゜H゛ level, and the AN of the second correction signal gate group 27
D gate 27a is opened, but the corresponding pulse signal E
Since the signal Y does not arrive, the subtraction correction signal Y is not output. While the user 20c continues to rotate normally as described above, the pulse signals D, E, and F are selected by the direction detection circuit 15 and the first correction signal gate group 26, and are continuously output as the addition correction signal X. is output as follows.

Next, RS-FFl7 and l8 are reset, RS-FFl6
When the reverse use 20c is reversed from the state in which F. ,E. ．． They are output in the order of D.

Then, the first pulse signal F causes the RS-FFl to
8 is set, and the output signal Pl8 of the "H" level is output from the output terminal Ql8, and the A of the first correction signal gate group 26
At the same time, the ND gate 26c is opened, and the second correction signal gate group 27, which had been opened by the inverted output signal of the front gate S-FF17, is opened. The subtraction correction signal Y is output from the output terminal of the 0R gate 27d through the AND gate 27b. Also, at this time, the RS-FF16 is reset by the pulse signal F, and an output signal of "H" level is output from the inverted output terminal Q=.
N1 gate 2 of the second correction signal gate group 27
Open 7a. Next, when pulse signal E comes, RS-FFl
7, resets RS-FFl8 and is opened by the inverted output signal Pl6 of said RS-FFl6)
AND gate 2 of the second modified signal gate group 27
A subtraction correction signal Y is output through 7a. At this time, the AND gate 26b of the first correction signal gate group 26
- It is opened by the output signals P and 7 of FF17, but since the corresponding pulse signal F does not come, the addition correction signal X is not output. Also, the inverted output signal of S-FFl8? Accordingly, the AND gate 27c of the second correction signal gate group 27 is opened.

Next, when the pulse signal D comes, the previous address A S-FFl6 is set and the signal Pl6 of ゜゜H゛ level is sent from the output terminal Ql6.
is output and the N1 gate 2 of the first correction signal gate group 26
6a and reset the RS-FF17,
The AND gate 27b of the second correction signal 27 is opened by the inverted output signal.

Then, the pulse signal D is transmitted to the second modified signal gate group 27 which was opened by the inverted output signal seat of the RS-FF18.
A subtraction correction signal Y is output from the AND gate 27c through the 0R gate 27d. Further, in this state, the pulse signal corresponding to the opened AND gate 5 of the first correction signal gate group 26 is not input, and the addition correction signal X is not output.

As mentioned above, when the user 20c is rotated in the forward direction, the contact signals are outputted from the rotary switch 30 in the order of Sl, S2, and S3, and the pulse signals are outputted through the latch circuit 8 and the pulse circuits 12, 13, and 14 as D, By outputting E and F in this order, the direction detection circuit 15 and the first correction signal gate group 26
As a result, a number of addition correction signals X corresponding to the pulse signals are output.

Further, when the user 20c is reversed, contact signals are outputted from the rotary switch 30 in the order of Sl, S2, and S3.
The pulse signals are transmitted in the order of D, F, E through the latch circuit 8 and the pulse forming circuits 12, 13, 14. By being output, the direction detection circuit 15 and the second correction signal gate group 27
The number of subtraction correction signals Y corresponding to the pulse signal is determined by
Output.

The waveforms of each part are shown in FIG. 4, and the pulse signals D, E, and F are the voltages shown in FIG. waveform, and the output from the direction detection circuit 15 is Pl69■LPl7
9[9P189巳-- has the voltage waveforms shown in FIG. and,
The addition correction signal/signal X1 and the subtraction correction signal Y are connected to the up count input terminal and the down count input terminal of the time counter 5, alarm memory circuit 21, respectively, and are selected by the function selection circuit 23. Use 20 for modifying and setting functions.
Perform the operation in c. Next, the overall operation of the digital electronic timepiece of the present invention will be explained.

In a normal state, the time function is selected by the function selection circuit 23, and a 1Hz signal from the frequency divider circuit 3, which performs frequency division by inputting the oscillation signal from the oscillation circuit 2, is used as an input for timekeeping operation. By the time counter 4 that performs
Timing information is displayed on the display device 7 via the display switching circuit 6. Further, the time function signal TK outputted from the function selection circuit 23 enables the time counter 4 to be corrected, and the content of the time counter 4 is corrected by inputting the addition correction signal X1 and the subtraction correction signal Y. I will be able to do it. Next, in order to adjust the time from this state, the user 20c is pulled one step from the (N) position to the (M) position, and the function correction mode switch 20d is turned on, and the AND gates 9, 10,
11 to enable generation of a correction signal.

And when you rotate the Riuse 20c in the normal direction, the Riuse 20c
An addition correction signal X corresponding to the speed of rotation is outputted and inputted to the up-count input terminal of the time counter 4 to correct the contents of the time counter in the direction of increasing it. Further, when the user 20c is reversed, a subtraction correction signal Y is outputted and inputted to the down count input terminal of the time counter 4, thereby correcting the contents of the time counter 4 in a decreasing direction.

When the correction is completed, the correction mode switch 20d is turned off by pushing in the user 20c to return to the normal state. Next, when the function selection button 20e is pressed once, the calendar function is selected by the function selection circuit 23,
The display device 7 displays the contents of the calendar counter 5.

In addition, the calendar function selection signal C from the function selection circuit 23
A, the calendar counter 5 receives the correction signals X, Y.
is in an input-enabled state, that is, in a modifiable state. In order to correct the contents of the calendar, the above-mentioned user 20c is pulled out by one step to make it possible to generate a correction signal, and when the above-mentioned user 20c is rotated forward or reverse, an addition correction signal X and a subtraction correction signal Y corresponding to the rotation of the corresponding use are generated. is output, the contents of the calendar counter 5 are sequentially added and corrected from the day, the month and year are corrected without selecting digits, and the contents are displayed on the display device 7.

When the correction is completed, press the use button 20c as described above to return to the normal calendar function.

Further, when the function selection button 20e is pressed once, the alarm function is selected by the function selection circuit 23, and the contents of the alarm memory circuit 21 are displayed on the display device 7, and at the same time, the alarm function is selected from the function selection circuit 23. The signal AL brings the alarm memory circuit 21 into a modifiable state. To change the alarm setting time, pull the above-mentioned user 20c by one step to make it possible to generate a correction signal signal, and then rotate the corresponding use 20c forward or reverse to change the addition correction signal X1 or the subtraction correction signal. Y is output, and the contents of the alarm memory circuit 2 can be sequentially added or subtracted from seconds to minutes and hours.

Once the setting of the alarm time is completed through the above operations, the user 20c can be pushed back to the original (N) position, and then the function selection button 20e can be pressed once to return to the time function. As described above, the rotary switch of the present invention is rotated forward and backward by the beam use, and the fixed contact and the movable contact have a numerical relationship that does not have a common divisor, and the contact signal from the fixed contact of the rotary switch. By providing a waveform shaping circuit for shaping and a direction detection circuit for detecting the order of contact signals sequentially generated from the waveform shaping circuit,
When adjusting the time on an electronic clock or setting an alarm time, the adjustment can be made in the direction of increase or decrease by simply rotating the dial in the forward or reverse direction. Since it can be determined, the function operation in electronic watches can be significantly improved.

Moreover, the present invention increases the number of pulses generated per rotation of the rotary switch by providing a plurality of possible contacts and a plurality of fixed contacts of the rotary switch, and by setting them in a numerical relationship that does not have a common divisor. As a result, the range of change in the correction speed is increased, and the direction detection circuit for the generated pulses is achieved with a simple circuit configuration. In addition, in this embodiment, a correction signal generator for correcting and setting each function in a digital electronic watch was explained, but the correction signal generation device can also be applied to a pointer-type electronic watch equipped with a forward and reverse motor. By providing a signal generating device, time can be easily corrected, and the correction signal generating device of the present invention can also be used for setting numerical values and positioning in various devices other than electronic watches. be.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an external view of the digital electronic timepiece according to the present invention, Fig. 2 is a plan view of a rotary switch shown in Fig. 1 and controlled by the user's operation, and Fig. 3 is a circuit block diagram. , FIG. 4 is a voltage waveform diagram of each part in FIG. 3.

20...Digital electronic clock, 20c...
Reuse, 30...Rotary switch, 2...
...Crystal oscillation circuit, 3... Frequency divider circuit, 4...
...Time counter, 8...Chattering prevention circuit, 12, 13, 14...Pulsing circuit, 15.
...Direction detection circuit, 16, 17, 18...
RS-FF126...first modified signal/signal gate group, 27...second modified signal gate group.

Claims (1)

[Claims] 1 Set by a rotary switch that is rotated forward and reverse by an external operating member and whose fixed contacts and possible contacts have a numerical relationship that does not have a common divisor, and corresponding contact signals from each of the fixed contacts. a contact signal latch circuit consisting of a plurality of flip-flops which are reset by respective contact signals from other fixed contacts; and the output signal of each flip-flop constituting the contact signal latch circuit is pulsed. A pulsing circuit that outputs a pulse signal synchronized with the operation of a rotary switch, which is sequentially set by each of the pulse signals sequentially generated by the pulsing circuit by rotating the rotary switch in one direction; a direction detection circuit consisting of a plurality of flip-flops that is reset by a pulse signal generated next to the signal; and a first correction signal gate receiving the output of each flip-flop of the direction detection circuit and each of the pulse signals as inputs. a second circuit whose inputs are the inverted output of each flip-flop and each of the pulse signals.
and an up/down counter that uses the output signal of the first modified signal gate group and the output signal of the second modified signal gate group as up-count input and down-count input, respectively. Features: Electronic clock correction signal generator.