CN1018130B - Timer circuit - Google Patents
Timer circuitInfo
- Publication number
- CN1018130B CN1018130B CN 89101408 CN89101408A CN1018130B CN 1018130 B CN1018130 B CN 1018130B CN 89101408 CN89101408 CN 89101408 CN 89101408 A CN89101408 A CN 89101408A CN 1018130 B CN1018130 B CN 1018130B
- Authority
- CN
- China
- Prior art keywords
- circuit
- timer
- output
- signal
- mentioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Abstract
The present invention relates to a timer circuit which provides a timer function for electrical and electronic devices with a remote control receiving function. The present invention comprises a constant voltage source, an initial reset circuit, an inverter amplifier, a phase inverter, a multivibrator circuit, a gate circuit, a timer power switching circuit, a display circuit, a switch muting circuit, a time constant switching circuit, a square wave generating circuit and an initial mode setting circuit.
Description
Involved in the present invention is a kind of timer circuit that timer function is provided for Electrical and Electronic equipment, more particularly, be on a kind of household electric appliances that possesses the remote control receiving function that can be installed in such as colour TV, and the timer circuit of long-time timing function is provided for it.
Traditional Electrical and Electronic product seldom has the electronic timer function, even be furnished with the high gear product of timer function, also is to realize its timer function by the microcomputer with time clock feature.Then, such problem that microcomputer faced is to be used for general Electrical and Electronic product, because they are too expensive, adopts them that cost is increased.In addition, another shortcoming is: unless the circuit of external equipment is made change, otherwise just can't use microcomputer with time clock feature.
Therefore, purpose of the present invention just provides a kind of timer circuit simple in structure, and it can additionally be installed on the household electrical appliance with distant control function, and long timer function is provided, and does not need to adopt simultaneously the microcomputer with time clock feature again.
In order to realize above-mentioned purpose of the present invention, timer circuit produces 4 kinds of mode signals according to the number of times that applies of set pulse signal, produce corresponding to first to the 3rd timer drive control signal of state with above-mentioned 4 kinds of mode signals simultaneously, and show described first to the 3rd timer drive control signal.Meanwhile, set the driving time of timer.
Below in conjunction with accompanying drawing embodiment of the present invention are described in detail.Wherein,
Accompanying drawing 1 is the block diagram of timer circuit of the present invention;
Referring to accompanying drawing 1, timer circuit of the present invention comprises that one is used to each to adopt direct voltage that the constant pressure source 1 of constant DC voltage is provided as the parts of input; An initial reset circuit 2 that is used at the initial time output reseting pulse signal of constant pressure source 1 output constant voltage; One is used for aaset bit pulse signal SP and amplifies and anti-phase amplifier 3; An output signal that is used for pair amplifier 3 is carried out anti-phase inverter I
1; A multivibrator circuit 4, its receives sees below from initial reset circuit 3 and its detailed description of initial modes initialization circuit 12() reseting pulse signal, and, export 4 kinds of mode signals then from the clock pulse signal of above-mentioned inverter I; A gate circuit 5, it produces first to the 3rd timer drive control signal according to second of multivibrator circuit 4 output to the four-mode signal; A timer power supply commutation circuit 6 is used for output timer driving power when receiving from any one of first to the 3rd timer drive control signal of above-mentioned gate circuit 5; A display 7 is used to show that first to the 3rd timer drive control signal is by above-mentioned gate circuit 5 these states of output and export the second and the 3rd timer time constant control signal simultaneously; A switch muting circuit 8 is used at inverter I
1Export a negative pulse during output pulse signal and at the initial time of constant pressure source 1 output constant voltage, a timer 9, when above-mentioned switch muting circuit 8 is exported undersuings, this timer is reset, when above-mentioned timer power supply commutation circuit 6 was exported the timer driving powers, this timer was driven; A time constant commutation circuit 10, it is that timer 9 is set three kinds of time constants according to the second and the 3rd timer time constant control signal from aforementioned display device 7; A square wave generation circuit 11 is used for output square-wave signal when timer 9 stops; And an initial modes initialization circuit 12, be used for when above-mentioned square wave generation circuit 11 output square waves output pulse signal and above-mentioned multivibrator 4 is resetted.Wherein, set pulse signal SP is used for as the pulse signal of setting timer, is delivered to remote control decoder and is used to control the power supply power supply by the square-wave signal that the OUT output of square-wave generator 11 is exported.
Accompanying drawing 2 is detail circuits figure, and having as mentioned above below with reference to 2 pairs in accompanying drawing, the operation principle and the effect of the timer circuit of the present invention of part are elaborated.
When direct voltage DC is provided, Zener diode ZD
1Zener voltage be used as constant DC voltage and exported, this voltage is delivered to each circuit, as driving voltage.
Meanwhile, under the initial condition of constant pressure source 1 its constant voltage of output, because the capacitor C in the initial reset circuit 2
2By constant-potential charge, just produced a pulse signal.This pulse signal is sent to reseting terminal RS
1And RS
2, make multivibrator FF
1And FF
2Reset, therefore at output Q
1And Q
2Last output low level signal and at output Q
1And Q
2Last output high level signal (this originate mode state is called first pattern).Multivibrator FF
1Output Q
1On high level signal be sent to NOR gate NOR
1And NOR
2Input, multivibrator FF
2Output Q
2On high level signal be sent to NOR gate NOR
2And NOR
3Input, therefore at NOR gate NOR
1, NOR
2, NOR
3Output on output low level signals all, thereby make the triode TR of timer power supply commutation circuit 6
2And TR
3And the triode TR of display 7
4And TR
6All be in cut-off state.
On the other hand, under the initial condition of constant pressure source 1 output constant voltage, because the capacitor C of switch muting circuit 8
4By constant-potential charge, just make triode TR
7Conducting, so low level signal is sent to the reset terminal R of timer 9
S, timer 9 is resetted.
When circuit working during at above-mentioned first mode state, if input set pulse signal SP, this signal will be by the resistance R of amplifier 3
3With diode D
2Make triode TR
1Conducting, output low level pulse signal on the collector electrode of this triode, inverter I
1Above-mentioned low level pulse signal is become the high level pulse signal, deliver to multivibrator FF then
1And FF
2Clock end CP
1And CP
2Yet, because under aforesaid state, multivibrator FF
2Output Q
2And Q
2Low level of being exported and high level signal are delivered to multivibrator FF respectively
1Input J
1And K
1, so multivibrator FF
1Continue to maintain under original state its output Q
1And Q
1Continue output low level and high level signal respectively.Because multivibrator FF under aforesaid state
1Output Q
1And Q
1The low level and the high level signal of output are sent to multivibrator FF
2Input K
2And J
2, so FF
2State be reversed its output Q
2And Q
2Export high level signal and low level signal (this state is called as second mode state) respectively.
When circuit working during, deliver to multi-harmonic-oscillations FF if import the mode that set pulse signal SP pulse signal will say by the front once again once more in above-mentioned second pattern
1Clock end CP
1And CP
2At this moment, multivibrator FF
1State be reversed its output Q
1And Q
1Export high level and low level respectively, and multivibrator FF
2Then maintain original state, its output Q
2And Q
2Export high level and low level signal respectively.(this state is called as three-mode).
When circuit is in three-mode, if import set pulse signal SP, multivibrator FF again
1The mode said according to the front of output signal maintain original state, its output Q
1And Q
1Continue output high level and low level signal, and multivibrator FF
2Output signal be reversed its output Q
2And Q
2Difference output low level and high level signal (this state is called as four-mode).
When circuit is in four-mode, if import asserts signal SP once more, multivibrator FF
1Output signal will overturn its output Q according to the mode that the front was said
1And Q
1Difference output low level signal and high level signal, and multivibrator FF
2Output signal then maintain original state, its output Q
2, Q
2Difference output low level and high level signal.That is to say, carve circuit at this moment and got back to the state identical again with initial condition, that is first mode state.
Like this, when continuous input asserts signal SP, multivibrator circuit will repeat above-mentioned four patterns.
At inverter I
1During output pulse signal, this signal is by the resistance 16 and the diode D of switch muting circuit 8
6Make triode TR
7Conducting, thus timer 9 is resetted.
As multivibrator FF
1, FF
2When exporting second mode signal, that is multivibrator FF
1And FF
2Output Q
1And Q
2Output high level signal, and output Q
1And Q
2During the output low level signal, the NOR gate NOR of gate circuit 5
1And NOR
2Output low level signal, and NOR gate NOR
3Then export high level signal.By NOR gate NOR
3The above-mentioned high level signal of output is called as the first timer drive control signal.
As multivibrator FF
1, FF
2When exporting the three-mode signal, that is multivibrator FF
1And FF
2Output Q
1, Q
2Output low level signal, and output Q
1And Q
2During the output high level signal, the NOR gate NOR of gate circuit 5
2The output high level signal, this high level signal is called as the second timer drive control signal.
As multivibrator FF
1And FF
2When exporting the four-mode signal, that is multivibrator FF
1And FF
2Output Q
1And Q
2Output high level, and output Q
1And Q
2During output low level, the NOR gate NOR of gate circuit 5
1The output high level signal, this high level signal is called as the 3rd timer drive control signal.
Like this, when gate circuit 5 output first timer drive control signal, NOR gate NOR just
3During the output high level signal, this high level signal is by the diode D of timer power supply commutation circuit 6
5And resistance R
6Make triode TR
2Conducting, and then make triode TR
3Also enter conducting state, thereby make driving power deliver to the power end Vcc of timer 9, be used to drive this timer.
At this moment, by NOR gate NOR
3The high level signal of output makes triode TR by the resistance 11 of display 7
6Conducting, thus make LED
3Shinny, be used for indication circuit working this moment at first mode state.Meanwhile, the triode TR of display 7
4, TR
5Be in cut-off state, so high level signal is sent to the triode TR of time constant commutation circuit 10
8And TR
9, make triode TR
8, TR
9Maintain cut-off state.
Therefore, the time constant of timer 9 only depends on the resistance R of time constant commutation circuit 10
20With capacitor C
5Numerical value, timer is driven in only during above-mentioned time constant.
When gate circuit 5 output second timer drive control signal, that is NOR gate NOR
2During the output high level signal, this signal is by the diode D of timer power supply commutation circuit 6
4And resistance R
6Make triode TR
2, TR
3Be in conducting state, thereby the power end Vcc that driving power is delivered to timer 9 is used for driving timing device 9.Simultaneously, NOR gate NOR
2The high level signal of output makes the triode TR of display 7
5Conducting, thus make LED
2Luminous; The Displaying timer device is operated in second driving condition.As triode TR
5Collector electrode output low level signal the time, this signal is called as second timer time constant control signal.Above-mentioned low level signal makes the triode TR of time constant commutation circuit 10
9Conducting, thus make resistance R
21Be in and resistance R
20The state that is in parallel.Like this, the time constant of timer 9 just depends on resistance R
20, R
21Resistance and capacitor C after in parallel
5Capacitance.
When gate circuit 5 outputs the 3rd timer drive control signal, that is NOR gate NOR
1During the output high level signal, the triode TR of timer power supply commutation circuit 6
2, TR
3By above-mentioned conducting, thereby driving power is delivered to the power end Vcc of timer 9, meanwhile, above-mentioned high level signal makes the triode TR of display 7
4Conducting, LED
1Shinny, be used for display circuit and be operated in the 3rd timer driving condition.Simultaneously, triode TR
4Low level signal of collector electrode output, this signal is called as the 3rd timer time constant control signal.
This low level signal makes the triode TR of time constant commutation circuit 10
8Conducting, thus make resistance R
22Be in and resistance R
20The state that is in parallel.Like this, the time constant of timer 9 just depends on resistance R
20, R
22Resistance in parallel and capacitor C
5Capacitance.
When input set pulse signal SP, time constant commutation circuit 10 just is switched, thereby just above-mentioned three kinds of time constants can be inserted timer 9.In other words, when suitably choosing resistance R
20, R
21, R
22Resistance, make to be R between them
22＜R
20＜R
21Concern the time, so at triode TR
8, TR
9By the time by resistance R
20With capacitor C
5Determined time constant maximum is at triode TR
9During conducting, by resistance R
20, R
21Parallel connection and capacitor C
5Determined time constant is less than top a kind of situation, at triode TR
8During conducting, by resistance R
20, R
22Parallel connection and capacitor C
5Determined time constant minimum.
During time constant commutation circuit 10 sets time constant, timer 9 is driven, and when timer 9 was driven, its output OT exported high level signal, made the triode TR of square wave generation circuit 11
10Be in cut-off state.Subsequently, when timer 9 stops to drive, its output OT output low level signal, capacitor C
7Charging voltage pass through resistance R
25Discharge, above-mentioned low level signal is delivered to triode TR
10Base stage, make this triode TR
10Conducting, and by its collector electrode output square-wave signal.This square-wave signal is by diode D
8By output OUT output, it can be delivered to remote control decoder and cut off a secondary power supply.
Because the triode TR of square wave generation circuit 11
10The square-wave signal of output is by the resistance R of initial modes initialization circuit 12
28With diode D
9Make triode TR
11Conducting, its collector electrode output low level signal, this signal further makes triode TR again
12Conducting.Like this, because by triode TR
12Constant voltage make capacitor C
10Charging will produce a pulse signal.Because above-mentioned pulse signal is delivered to multivibrator FF
1And FF
2Reset terminal RS
1And RS
2, multivibrator FF
1And FF
2Just be reset to the initial modes state.
As mentioned above, the invention has the advantages that the number of applications according to the set pulse signal, for timer has been set three kinds of times, and export with it corresponding control signal, so just can provide timing function for the remote-receiver that does not possess time clock feature. Because the present invention does not adopt the microcomputer with time clock feature of any costliness, structure is very simple, thereby helps to reduce cost.
Claims (1)
1, a kind of for electronics and electric equipment provide the circuit of timer function, it is characterized in that this circuit comprises a constant pressure source 1 that is used to each partial circuit that constant voltage is provided; An initial reset circuit 2 that is used for providing the initial moment output pulse signal of constant voltage at above-mentioned constant pressure source; One is used for aaset bit pulse signal SP and amplifies and anti-phase amplifier 3; One is used for the output signal of above-mentioned amplifier is carried out anti-phase inverter I
1, a multivibrator circuit 4; It is resetted by the pulse signal of above-mentioned initial reset circuit 2 outputs, and according to by inverter I
14 kinds of mode signals of number of pulse signals output of being exported; A gate circuit 5, it produces first to the 3rd timer drive control signal according to second of multivibrator circuit 4 output to the four-mode signal; A timer power supply commutation circuit 6 is used for output timer driving power when receiving any one of first to the 3rd timer drive control signal that above-mentioned gate circuit 5 produced; A display circuit 7 is used to show first to the 3rd timer drive control signal by above-mentioned gate circuit 5 outputs, exports the second and the 3rd timer time constant control signal simultaneously; A switch muting circuit 8 is used at inverter I
1During output pulse signal and at the initial time output pulse signal of constant pressure source 1 output constant voltage; A timer 9, when above-mentioned switch muting circuit 8 output pulse signals, this timer is reset, and when above-mentioned timer power supply commutation circuit 6 output timer driving powers, this timer is driven; A time constant commutation circuit 10, it is according to being switched by the second and the 3rd timer time constant control signal of display circuit 7 outputs and being that timer 9 is set three kinds of time constants; A square wave generation circuit 11, it exports square-wave signal when timer 9 stops, and this square-wave signal is exported as power supplying control signal; An initial modes initialization circuit 12 is used for output pulse signal when above-mentioned square wave generation circuit 11 is exported square-wave signals, so that multivibrator circuit 4 is resetted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89101408 CN1018130B (en) | 1989-01-23 | 1989-01-23 | Timer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89101408 CN1018130B (en) | 1989-01-23 | 1989-01-23 | Timer circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1044555A CN1044555A (en) | 1990-08-08 |
| CN1018130B true CN1018130B (en) | 1992-09-02 |
Family
ID=4854276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89101408 Expired CN1018130B (en) | 1989-01-23 | 1989-01-23 | Timer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1018130B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350614B (en) * | 2007-07-17 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Control circuit for electric timing switch |
| CN101729047B (en) * | 2008-10-29 | 2012-06-20 | 苏州中科集成电路设计中心有限公司 | Circuit structure for realizing nanoscale time delay |
| CN112131160B (en) * | 2020-09-27 | 2023-06-23 | 京东科技信息技术有限公司 | Working mode switching circuit, working mode switching method and robot |
-
1989
- 1989-01-23 CN CN 89101408 patent/CN1018130B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044555A (en) | 1990-08-08 |
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |