CN2765408Y - Ring current signal generating circuit - Google Patents
Ring current signal generating circuit Download PDFInfo
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- CN2765408Y CN2765408Y CN 200420118198 CN200420118198U CN2765408Y CN 2765408 Y CN2765408 Y CN 2765408Y CN 200420118198 CN200420118198 CN 200420118198 CN 200420118198 U CN200420118198 U CN 200420118198U CN 2765408 Y CN2765408 Y CN 2765408Y
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Abstract
The utility model discloses a ring current signal generating circuit, which comprises an input filter circuit, a voltage transformation circuit, an output electronic switch, a chip peripheral circuit, a sine wave filter circuit, a short protection circuit, a photoelectric isolation circuit, an output electronic switch driving circuit, a reference source circuit, a feedback control circuit and an auxiliary power supply. The utility model uses a novel overcurrent short-circuit protection and delay circuit and the electronic switch driving circuit, so that the distortion of ring current signal is smaller than or equal to 5%, and the function of the short protection circuit is reliable. No matter a module is in the state of normal load or biasing load, the module can achieve the function of protection when overload (overcurrent) or load short circuit happens, so that the reliability of products is increased.
Description
[technical field]
The utility model relates to a kind of ringing current signal generating circuit.
[background technology]
The ringing signal generator provides bell signal for telephone set.Early stage adopt centralizedly, provide the ringing signal of whole system by independent frame, its power output is bigger; Many in the recent period employings are distributed, and the secondary power supply of ringing signal generator and stored-program control exchange is combined into modular construction, and power output does not wait from several watts to tens of watts.The circuit pattern of ringing signal generator is the DC/AC converter.
The developing direction of current ringing signal generator circuit is to adopt the SPWM pattern, and its volume is little, in light weight, power is big, and the ringing signal generator also should possess good overload and short-circuit protection characteristic, to improve reliability.
The less function that protection of input overvoltage/undervoltage and output voltage fine setting are set of present ringing-current module; its threshold current, overcurrent protection, short-circuit protection function are summarized in the output current limitation function; because these three functions are not only had any different but also be related, can not be separately strict.Existing ringing-current is in the biasing application process, and overcurrent protection, short-circuit protection function shortcoming cause module that a certain proportion of inefficacy is arranged in actual applications.
[utility model content]
The utility model technical issues that need to address just are to overcome the defective of prior art; a kind of ringing current signal generating circuit is provided; it utilizes novel overcurrent short-circuit protection and delay circuit and electronic switch drive circuit; make ringing signal intermodulation distortion little (≤5%), the short-circuit protection circuit reliable in function.No matter be module at normal load state or biasing stress state, when overload (overcurrent) situation or load short circuits situation occurring, module can both realize protection, thereby has improved reliability of products.
For addressing the above problem, the utility model is taked following technical scheme:
The utility model ringing current signal generating circuit, it comprises following circuit: input filter circuit, transforming circuit, output electronic switch, chip periphery circuit, sinusoidal wave filter circuit, short-circuit protection circuit, photoelectric isolating circuit, output electronic switch drive circuit, reference source circuit, feedback control circuit and accessory power supply.
Described short-circuit protection circuit is overcurrent short-circuit protection and delay circuit, and it is made up of two parts, forms the two-way voltage comparator circuit by IC01, adopts dual power supply; Form hysteresis comparator circuit by IC02, guard signal is provided.Described two-way voltage comparator circuit is made up of resistance R 5, capacitor C 1 and comparator IC01; Described hysteresis comparator circuit is made up of resistance R 6, capacitor C 2 and comparator IC02.
Described output electronic switch drive circuit is made up of resistance R 22, optocoupler IC1, drive signal A and resistance R 23, optocoupler IC2 and drive signal B.
The utility model overcurrent short-circuit protection and delay circuit divide two parts to form, and form the two-way voltage comparator by IC01, adopt dual power supply.Form hysteresis comparator by IC02, guard signal is provided.
1, as over-current signal (+Im or-Im) or during short-circuit signal, signal is obtained voltage signal by the RS resistance sampling, voltage signal enters 2 pin of comparator IC01, the input of 5 pin after through R5, C1 filtering.The voltage signal (to 6 pin of IC01) that the voltage signal that this voltage signal and R1, R2 electric resistance partial pressure are obtained (to 3 pin of IC01) and R3, R4 electric resistance partial pressure are obtained carries out voltage ratio, when the voltage signal of sampling surpasses 3 pin, 6 pin setting threshold values, comparator IC01 action, 1 pin, 7 pin output low levels.This low level signal makes the 2 pin input voltages of amplifier IC02 be dragged down (about 0.7V), and 2 pin signals by the signal obtained with R7, R8 electric resistance partial pressure relatively make the action of IC02 amplifier, 1 pin output high level, and R9 is the return difference resistance of amplifier IC02.The base stage of 1 pin high level by triode Q1 makes the Q1 conducting, the collector electrode output low level of Q1, thus guard signal is provided.R10 is the pull-up resistor of Q1, guarantees the complete conducting of Q1, makes that the low level of collector electrode output is more reliable.By adjusting return difference resistance R 9, the intermittent time in the time of can adjusting overcurrent or short circuit, return difference is more little, and the loss when overcurrent or short circuit strengthens.
2, delay circuit is to form by resistance R 6, capacitor C 2, and be the time constant of R6, C2 time of delay.The course of work is: when V+ had electricity, voltage gave capacitor C 2 chargings by resistance R 6, charges moment, and capacitor C 2 short circuits make amplifier IC02 2 pin be in low level, and guard signal is provided.According to above-mentioned 1 description, this moment, amplifier IC02 1 pin was a low level, and this moment, this circuit provided guard signal.When capacitor C 2 has surpassed the threshold values of the voltage signal of being obtained by resistance R 7, resistance R 8 electric resistance partial pressures towards electricity, amplifier IC02 1 pin step-down.1 pin low level makes Q1 end by the base stage of triode Q1, and the collector electrode of Q1 is exported high level, thus the excision guard signal.
The operation principle and the process of the utility model electronic switch drive circuit are: feedback control signal through amplifier according to the resistance of resistance R 20, resistance R 21 after certain proportion amplifies, when control signal is high level, signal makes optocoupler IC1 conducting by resistance R 22, and this moment, drive signal A was a low level; Synchronous signal makes optocoupler IC2 end by R23 resistance; this moment, V+ voltage made that by rectifying tube D20 drive signal B is a high level; wherein resistance R 24, resistance R 25 play metering function; electric capacity plays the effect of filtering clutter; voltage-stabiliser tube Z20 plays the effect of pressure limiting; prevent that drive signal from having the overvoltage signal, protection late-class circuit, 27 metering functions of resistance R.(rectifying tube D20, resistance R 27 can not add according to circumstances).When control signal is low level; signal makes optocoupler IC1 end by current-limiting resistance R22; this moment, Vo+ voltage made that by current-limiting resistance R29, resistance R 28 drive signal A is a high level; wherein voltage-stabiliser tube Z21 plays the effect of pressure limiting; prevent that drive signal from having the overvoltage signal; the protection late-class circuit, 26 metering functions of resistance R.(R26 can not add according to circumstances) synchronous signal makes optocoupler IC2 conducting by current-limiting resistance R23, and this moment, drive signal B was a low level.Drive signal A, drive signal B are along with the frequency of feedback control signal realizes alternation switch like this.This circuit is widely used in the driving of output electronic switch in the ringing-current circuit.
Advantage of the present utility model is that it utilizes novel overcurrent short-circuit protection and delay circuit and electronic switch drive circuit, makes ringing signal intermodulation distortion little (≤5%), the short-circuit protection circuit reliable in function.No matter be module at normal load state or biasing stress state, when overload (overcurrent) situation or load short circuits situation occurring, module can both realize protection, thereby has improved reliability of products.
[description of drawings]
Fig. 1 is the utility model structured flowchart.
Fig. 2 is the circuit diagram of the utility model overcurrent short-circuit protection and delay circuit.
Fig. 3 is the circuit diagram of the utility model electronic switch drive circuit.
[embodiment]
As shown in Figure 1; the utility model ringing current signal generating circuit, it comprises following circuit: input filter circuit 1, transforming circuit 2, output electronic switch 3, chip periphery circuit 4, sinusoidal wave filter circuit 5, short-circuit protection circuit 6, photoelectric isolating circuit 7, output electronic switch drive circuit 8, reference source circuit 9, feedback control circuit 10 and accessory power supply 11.
As shown in Figure 2, described short-circuit protection circuit is overcurrent short-circuit protection and delay circuit, and it is made up of two parts, forms the two-way voltage comparator circuit by IC01, adopts dual power supply; Form hysteresis comparator circuit by IC02, guard signal is provided.Described two-way voltage comparator circuit is made up of resistance R 5, capacitor C 1 and comparator IC01; Described hysteresis comparator circuit is made up of resistance R 6, capacitor C 2 and comparator IC02.
1, as over-current signal (+Im or-Im) or during short-circuit signal, signal is obtained voltage signal by the RS resistance sampling, voltage signal enters 2 pin of comparator IC01, the input of 5 pin after through R5, C1 filtering.The voltage signal (to 6 pin of IC01) that the voltage signal that this voltage signal and R1, R2 electric resistance partial pressure are obtained (to 3 pin of IC01) and R3, R4 electric resistance partial pressure are obtained carries out voltage ratio, when the voltage signal of sampling surpasses 3 pin, 6 pin setting threshold values, comparator IC01 action, 1 pin, 7 pin output low levels.This low level signal makes the 2 pin input voltages of amplifier IC02 be dragged down (about 0.7V), and 2 pin signals by the signal obtained with R7, R8 electric resistance partial pressure relatively make the action of IC02 amplifier, 1 pin output high level, and R9 is the return difference resistance of amplifier IC02.The base stage of 1 pin high level by triode Q1 makes the Q1 conducting, the collector electrode output low level of Q1, thus guard signal is provided.R10 is the pull-up resistor of Q1, guarantees the complete conducting of Q1, makes that the low level of collector electrode output is more reliable.By adjusting return difference resistance R 9, the intermittent time in the time of can adjusting overcurrent or short circuit, return difference is more little, and the loss when overcurrent or short circuit strengthens.
2, delay circuit is to form by resistance R 6, capacitor C 2, and be the time constant of R6, C2 time of delay.The course of work is: when V+ had electricity, voltage gave capacitor C 2 chargings by resistance R 6, charges moment, and capacitor C 2 short circuits make amplifier IC02 2 pin be in low level, and guard signal is provided.Describe according to above-mentioned (1), this moment, amplifier IC02 1 pin was a low level, and this moment, this circuit provided guard signal.When capacitor C 2 has surpassed the threshold values of the voltage signal of being obtained by resistance R 7, resistance R 8 electric resistance partial pressures towards electricity, amplifier IC02 1 pin step-down.1 pin low level makes Q1 end by the base stage of triode Q1, and the collector electrode of Q1 is exported high level, thus the excision guard signal.
As shown in Figure 3, described output electronic switch drive circuit is made up of resistance R 22, optocoupler IC1, drive signal A and resistance R 23, optocoupler IC2 and drive signal B.
Feedback control signal through amplifier according to the resistance of resistance R 20, resistance R 21 after certain proportion amplifies, when control signal was high level, signal made optocoupler IC1 conducting by resistance R 22, this moment, drive signal A was a low level; Synchronous signal makes optocoupler IC2 end by R23 resistance; this moment, V+ voltage made that by rectifying tube D20 drive signal B is a high level; wherein resistance R 24, resistance R 25 play metering function; electric capacity plays the effect of filtering clutter; voltage-stabiliser tube Z20 plays the effect of pressure limiting; prevent that drive signal from having the overvoltage signal, protection late-class circuit, 27 metering functions of resistance R.(rectifying tube D20, resistance R 27 can not add according to circumstances).When control signal is low level; signal makes optocoupler IC1 end by current-limiting resistance R22; this moment, Vo+ voltage made that by current-limiting resistance R29, resistance R 28 drive signal A is a high level; wherein voltage-stabiliser tube Z21 plays the effect of pressure limiting; prevent that drive signal from having the overvoltage signal; the protection late-class circuit, 26 metering functions of resistance R.(R26 can not add according to circumstances) synchronous signal makes optocoupler IC2 conducting by current-limiting resistance R23, and this moment, drive signal B was a low level.Drive signal A, drive signal B are along with the frequency of feedback control signal realizes alternation switch like this.
Claims (3)
1, a kind of ringing current signal generating circuit comprises input filter circuit (1), transforming circuit (2), output electronic switch (3), chip periphery circuit (4), sinusoidal wave filter circuit (5), short-circuit protection circuit (6), photoelectric isolating circuit (7), output electronic switch drive circuit (8), reference source circuit (9), feedback control circuit (10) and accessory power supply (11); It is characterized in that: the input signal positive pole connects the input of input filter circuit (1), the centre tap of the primary coil of the output termination transforming circuit (2) of input filter circuit (1); The input signal negative pole connects the input of chip periphery circuit (4), two input terminations of the primary coil of the output termination transforming circuit (2) of chip periphery circuit (4), and the output of transforming circuit (2) links to each other with the input of output electronic switch (3); The output of output electronic switch (3) links to each other sinusoidal wave filter circuit (5) sine wave output signal with the input of sinusoidal wave filter circuit (5); An output of sinusoidal wave filter circuit (5) links to each other with an input of feedback control circuit (10) simultaneously, and another output of sinusoidal wave filter circuit (5) links to each other with short-circuit protection circuit (6) by resistance R 5; Short-circuit protection circuit (6) output two-way guard signal, the overcurrent protection signal links to each other with the control line of output electronic switch (3), and the short-circuit protection signal links to each other with 1 pin of photoelectric isolating circuit (7) and one tunnel output signal of feedback control circuit (10); Another road output signal of feedback control circuit (10) links to each other with output electronic switch drive circuit (8) input, and output electronic switch drive circuit (8) output links to each other with the control line of output electronic switch (3); 3,4 pin of photoelectric isolating circuit (7) link to each other with the VREF pin with the E/A+ pin of chip periphery circuit (4) respectively; Reference source circuit (9) is feedback control circuit (10) power supply; Accessory power supply (11) is chip periphery circuit (4) power supply.
2, ringing current signal generating circuit as claimed in claim 1, it is characterized in that: described short-circuit protection circuit is overcurrent short-circuit protection and delay circuit, it is made up of two parts: a part is formed the two-way voltage comparator circuit by comparator IC01, signal is by the RS resistance sampling, obtain voltage signal, behind R5, C1 filter circuit, enter input 2 pin and 5 pin of comparator IC01; The two-way voltage comparator circuit adopts dual power supply, and 3 pin that one road voltage signal is given IC01 through R1, R2 electric resistance partial pressure are signal as a comparison, and 6 pin that another road voltage signal is given IC01 through R3, R4 electric resistance partial pressure are signal as a comparison; Another part is formed hysteresis comparator circuit by amplifier IC02, and 1 and 7 pin of comparator IC01 are attempted by the negative pole of diode D1, and the positive pole of diode D1 is through delay circuit, i.e. resistance R 6 and capacitor C 2 are connected to 2 pin of amplifier IC02; Provide comparison signal by resistance R 7, R8 dividing potential drop for 3 pin of amplifier IC02, R9 is connected across between 1 pin and 3 pin of amplifier IC02, as return difference resistance; 1 pin of IC02 links to each other with the base stage of triode Q1, and the collector electrode of triode Q1 links to each other with the negative pole of diode D2 and D3 respectively, and the positive pole of diode D2 and D3 is exported the two-way guard signal respectively.
3, ringing current signal generating circuit as claimed in claim 1 or 2 is characterized in that described output electronic switch drive circuit is made up of resistance R 22, optocoupler IC1, drive signal A and resistance R 23, optocoupler IC2 and drive signal B; Feedback control signal is amplified through operational amplifier after the output of 1 pin, be connected respectively to 1 pin of optocoupler IC1 and 2 pin of optocoupler IC2 by resistance R 22, R23,4 pin of optocoupler IC1 connect a pin of resistance R 26, and another pin of resistance R 26 and 3 pin of optocoupler IC1 are formed drive signal A jointly; 4 pin of optocoupler IC2 connect a pin of resistance R 27, and another pin of resistance R 27 and 3 pin of optocoupler IC2 are formed drive signal B jointly; Between 3,4 pin of optocoupler IC1 cross-over connection voltage-stabiliser tube Z21, the positive pole of voltage-stabiliser tube Z21 connects 3 pin, negative pole connects 4 pin; The Vo+ power supply links to each other with 4 pin of IC1 with resistance R 28 by current limliting series resistor R29; 3 of optocoupler IC2 links to each other with the positive pole of voltage-stabiliser tube Z20 and a pin of capacitor C 20, and 4 pin of optocoupler IC2 link to each other with a pin of resistance R 25; Another pin of the negative pole of voltage-stabiliser tube Z20, capacitor C 20 links to each other with the V+ power supply with rectifying tube D20 by resistance R 24 with another pin of resistance R 25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118198 CN2765408Y (en) | 2004-12-03 | 2004-12-03 | Ring current signal generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118198 CN2765408Y (en) | 2004-12-03 | 2004-12-03 | Ring current signal generating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2765408Y true CN2765408Y (en) | 2006-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420118198 Expired - Lifetime CN2765408Y (en) | 2004-12-03 | 2004-12-03 | Ring current signal generating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2765408Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753746B (en) * | 2008-12-09 | 2012-05-09 | 北京飞音时代技术有限公司 | Trapezoidal wave ringing current generating device adopting PWM control |
| CN101448053B (en) * | 2008-12-22 | 2012-12-26 | 深圳信息职业技术学院 | Ringing current signal generating circuit |
| CN112260526A (en) * | 2020-10-30 | 2021-01-22 | 瑞斯康达科技发展股份有限公司 | Ringing current power supply and method for generating ringing current signal based on ringing current power supply |
| CN115273378A (en) * | 2022-07-22 | 2022-11-01 | 深圳市电利通科技有限公司 | Linear multi-point type temperature-sensing fire detector and processing method thereof |
-
2004
- 2004-12-03 CN CN 200420118198 patent/CN2765408Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753746B (en) * | 2008-12-09 | 2012-05-09 | 北京飞音时代技术有限公司 | Trapezoidal wave ringing current generating device adopting PWM control |
| CN101448053B (en) * | 2008-12-22 | 2012-12-26 | 深圳信息职业技术学院 | Ringing current signal generating circuit |
| CN112260526A (en) * | 2020-10-30 | 2021-01-22 | 瑞斯康达科技发展股份有限公司 | Ringing current power supply and method for generating ringing current signal based on ringing current power supply |
| CN115273378A (en) * | 2022-07-22 | 2022-11-01 | 深圳市电利通科技有限公司 | Linear multi-point type temperature-sensing fire detector and processing method thereof |
| CN115273378B (en) * | 2022-07-22 | 2024-02-23 | 深圳市电利通科技有限公司 | Linear multipoint temperature-sensing fire detector and processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING SUPLET CO., LTD. Free format text: FORMER NAME: BEIJING XINLEINENG CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 102200, room 285, block B, No. 9, front road, Changping District science and Technology Park, Beijing Patentee after: Beijing Suplet Co., Ltd. Address before: Beijing City, Xisanqi road 100096 Patentee before: Beijing Xinleineng Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141203 Granted publication date: 20060315 |