CN204442308U - A kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link - Google Patents
A kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link Download PDFInfo
- Publication number
- CN204442308U CN204442308U CN201520169232.XU CN201520169232U CN204442308U CN 204442308 U CN204442308 U CN 204442308U CN 201520169232 U CN201520169232 U CN 201520169232U CN 204442308 U CN204442308 U CN 204442308U
- Authority
- CN
- China
- Prior art keywords
- switch
- triodes
- power supply
- voltage
- pulse
- 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.)
- Active
Links
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model discloses a kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link, and comprise triode pulse driving circuit, the control input end of described transistor drive circuit connects a trigger impulse input signal; Described transistor drive circuit comprises two triodes, two triodes are positive-negative-positive and NPN knot respectively, the collector electrode docking of two triodes is as pulse output end, the base stage of two triodes is described control input ends, one is accessed respectively every straight coupling capacitance between described two control input ends and trigger impulse input signal, between the base stage and emitter of described two triodes, alternately access a DC power supply respectively by switch, described DC power supply is used for arranging pulse output end and is in reset mode.The utility model is added by coupling capacitance and additional dc power supply, reduces the rising and falling time of pulsing, and can realize two-way output pulse according to the signal of input.
Description
Technical field
The utility model belongs to electronic circuit field.Being specifically related to a kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link.This circuit has following features: being not less than the program-controlled and low and high level of the pouring into and pull out current driving ability, the rising being not more than 10nS and decline fast-pulse edge, to switch a link without a point gear of 0.5A, pulse amplitude can set respectively.
Background technology
According to the regulation of country to electronic devices and components parameter metrology method of testing, Trr reverse recovery time of low-power level signal diode, Td time of delay, the rise time Tr of optical coupler, bipolar transistor, field effect transistor, memory time Ts, fall time Tf, service time Ton, turn-off time Toff equal time parameter need to test as the important indicator of examination element characteristic.And also clearly refer in method of testing and will test above parameter, as shown in Figure 1, need to adopt quick edge pulse generating circuit as driving source.
In conventional test circuitry as shown in Figure 2, make the quick edge pulse generating circuit with certain current load ability, the form of the class-D amplifier circuit with direct-current coupling structure can be adopted, when input signal is high, lower end triode Q2 conducting, upper end triode Q1 ends, and output voltage approximates V-; When input signal saltus step is low, Q2 ends Q1 conducting, and output voltage saltus step is V+, and can meet the index that the rise time is less than 10nS.In this circuit, the voltage stabilizing value of voltage stabilizing didoe D1 and D2 must be carried out exact matching with V+ and V-value and could be driven rear class triode Q1 and Q2 co-ordination, such as when signal source is 0 to ± 5V, V+ and V-value is that the voltage stabilizing value of 7.7V and-7.7V, D1 and D2 is also different respectively; Otherwise once mate improper, the overlong time that Q1 and Q2 enters simultaneously conducting or end, circuit characteristic will sharply be deteriorated simultaneously.Therefore such circuit pulse amplitude is difficult to accomplish program-controlled adjustment, if want to realize the program control of pulse amplitude, a kind of thinking adopts many group voltage stabilizing didoes to mate many group V+ and V-values, but gear certainly will be brought like this to switch link, thus causing circuit complicated, poor reliability, if want to accomplish V+ and V-value continuously adjustabe, then need to segment more voltage stabilizing didoe gear, and V+ and V-value can reduce because mating the improper porch quality that causes with voltage stabilizing didoe at some section.
Summary of the invention
The purpose of this utility model proposes a kind of nothing to divide gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link, for overcoming foregoing circuit shortcoming, this circuit AC coupled replacement direct-current coupling solves point gear problem that voltage stabilizing didoe voltage matches is brought.
To achieve these goals, the technical solution of the utility model is: a kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link, comprise triode pulse driving circuit, the control input end of described triode pulse driving circuit connects a trigger impulse input signal; Described triode pulse driving circuit comprises two triodes, two triodes are positive-negative-positive and NPN knot respectively, the collector electrode docking of two triodes is as pulse output end, the base stage of two triodes is described control input ends, one is accessed respectively every straight coupling capacitance between described two control input ends and trigger impulse input signal, between the base stage and emitter of described two triodes, alternately access a DC power supply respectively by switch, described DC power supply is used for arranging pulse output end and is in reset mode.
Scheme is further: the base stage of described two triodes and also access a voltage-stabiliser tube respectively between straight coupling capacitance, and described DC power supply is applied between the base stage of triode and emitter by the voltage of voltage regulation of voltage-stabiliser tube.
Scheme is further: the voltage of described DC power supply is 5 volts, and the voltage of voltage regulation of described voltage-stabiliser tube is 2.7 volts.
Scheme is further: described switch is grammed switch, is by the electronic switch of a Microprocessor S3C44B0X.
Scheme is further: described switch is grammed switch, by the electronic switch of a Microprocessor S3C44B0X, the output of electronic switch is serially connected with a resistance, when DC power supply connected by electronic switch, DC power supply is connected between straight coupling capacitance and voltage-stabiliser tube by described resistance, when electronic switch disconnects DC power supply, described resistance is attempted by every straight coupling capacitance, between voltage-stabiliser tube and emitter.
The utility model is added by coupling capacitance and additional dc power supply, reduces the rising and falling time of pulsing, and can realize two-way output pulse according to the signal of input; This circuit AC coupled replacement direct-current coupling solves point gear problem that voltage stabilizing didoe voltage matches is brought.Can carry out adjustment by program to circuit to control, circuit is simple and practical.The rise or fall time that the utility model provides is less than 10nS, and current driving ability is not less than 0.5A, and pulse amplitude program-controlled quick edge pulse generating circuit, the test request of all kinds of middle low power element can be met.
Below in conjunction with drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is electronic devices and components parameter metrology test bipolar transistor time parameter test philosophy figure;
Fig. 2 is traditional class-D amplifier circuit with direct-current coupling structure;
Fig. 3 is the utility model logical circuit schematic diagram;
Fig. 4 is the utility model positive pulse output circuit form schematic diagram;
Fig. 5 is the utility model negative pulse output circuit form schematic diagram.
Embodiment
Nothing divides gear to switch a quick edge pulse generating circuit for the program-controlled amplitude of link, and as shown in Figure 3, comprise triode pulse driving circuit, the control input end of described triode pulse driving circuit connects a trigger impulse input signal F, described triode pulse driving circuit comprises two triodes, two triodes are the Q2 of Q1 and the NPN knot of positive-negative-positive respectively, the collector electrode c of two triodes docks as pulse output end T, the base stage b of two triodes is described control input ends, one is accessed between control input end and trigger impulse input signal respectively every straight coupling capacitance C1 and C2 at described two, alternately a DC power supply CE1 and CE2 is accessed respectively by K switch 1 and K2 between the base stage and emitter of described two triodes, described DC power supply is used for arranging pulse output end and is in reset mode, namely two triodes are in critical conduction mode.
In embodiment: the base stage of described two triodes and also access voltage-stabiliser tube D1 and D2 respectively between straight coupling capacitance, described DC power supply is applied between the base stage of triode and emitter by the voltage of voltage regulation of voltage-stabiliser tube.
In embodiment: the voltage of described DC power supply is 5 volts, the voltage of voltage regulation of described voltage-stabiliser tube is 2.7 volts.
In embodiment: described switch is grammed switch, by the electronic switch of a Microprocessor S3C44B0X, the control end of electronic switch connects microprocessor-based control output pin, the controlled terminal of electronic switch is connected to resistance R1 and R2, as shown in Figure 3, when DC power supply accesses by electronic switch, DC power supply CE1 or CE2 is connected in series resistance R1 or R2 between straight coupling capacitance C1 or C2 and voltage-stabiliser tube D1 or D2, when DC power supply disconnects by electronic switch, electronic switch described resistance R1 or R2 to be attempted by between the tie point and the emitter of Q1 of straight coupling capacitance C1 or C2 and voltage-stabiliser tube D1 or D2 simultaneously or and the emitter of Q2 between, the object of the resistance of above-mentioned access makes two triodes be in critical conduction mode.
Operation principle illustrates:
As shown in Figure 4, in generation by the positive pulse output circuit of V-to V+, the input of circuit need apply the negative pulse of an equal pulse duration, and this pulse can be produced by cmos digital circuit.Before pulse arrives, first arrange and be input as high level state, two-way programme-controlled dc power is set to V+ and V-respectively.Now upper end triode Q1 because the existence of R1 makes VBE voltage very little by, lower end triode Q2 because floating DC power supply CE2 provides the Vbe conducting voltage of Q2 and conducting by R2.Ac coupling capacitor serves the effect of isolated DC, and the voltage that C1 bears is the difference of V+ and putting high level voltage, and the voltage that C2 bears is the difference that putting high level voltage and V-add CE2 voltage.Resistance R1 and R2 also provides the discharge and recharge path of C1 and C2 simultaneously, and after circuit powers on and stablizes, circuit enters initial steady state, and now circuit exports as low level V-.Suitably choose R1 and R2 resistance and can obtain the shorter charging interval and the change in voltage simultaneously met in pulse duration on electric capacity C1 and C2 meets the demands.
When the negative pulse of input is along arriving, C1 and C2 is because both end voltage can not be suddenlyd change, force the base stage of upper end triode Q1 and lower end triode Q2 to be subject to negative pulse to drive simultaneously, the Vbe voltage of Q1 is increased and conducting, the Vbe voltage of Q2 reduces and ends, circuit exports forward fast-pulse edge, and amplitude is by V-to V+, and circuit exports and enters maintenance high level state.But C1 and C2 in this case can slowly discharge and recharge, so this state is unstable, circuit can not remain on output high level state always, need to reset.The pulse duration of this circuit can keep more than 10uS, can meet the test request of time parameter completely.
End-of-pulsing can by circuit reset, input gets back to high level by low level, C1 and C2 plays AC coupled effect again, force the base stage of upper end triode Q1 and lower end triode Q2 to be subject to positive pulse to drive simultaneously, Q1 ends and Q2 conducting, now circuit exports the fast-pulse edge producing negative sense, and amplitude is by V+ to V-, and circuit gets back to stable initial state.Circuit, completing in a complete program-controlled amplitude pulses process, creates the fast-pulse edge of a forward and the fast-pulse edge of a negative sense, and these two fast-pulse edges all can be used for testing time parameter to use.
Conversely, as shown in Figure 5, circuit of the present invention also can form negative pulse output circuit form, cut off floating DC power supply CE2, only need be connected between V+ and R1 by floating DC power supply CE1, input a positive pulse from input, operation principle is identical with positive pulse output circuit.In addition, V+ and V-respectively adds one group of floating DC power supply CE1 and CE2, and carries out suitable switching with grammed switch, then can realize any selection that positive negative pulse stuffing exports.
The utility model is applied to discrete device switch parameter test macro, obtains good effect.
Claims (4)
1. nothing divides gear to switch a quick edge pulse generating circuit for the program-controlled amplitude of link, and comprise triode pulse driving circuit, the control input end of described transistor drive circuit connects a trigger impulse input signal; It is characterized in that, described transistor drive circuit comprises two triodes, two triodes are positive-negative-positive and NPN knot respectively, the collector electrode docking of two triodes is as pulse output end, the base stage of two triodes is described control input ends, one is accessed respectively every straight coupling capacitance between described two control input ends and trigger impulse input signal, between the base stage and emitter of described two triodes, alternately access a DC power supply respectively by switch, described DC power supply is used for arranging pulse output end and is in reset mode.
2. pulse generating circuit according to claim 1, it is characterized in that, the base stage of described two triodes and also access a voltage-stabiliser tube respectively between straight coupling capacitance, described DC power supply is applied between the base stage of triode and emitter by the voltage of voltage regulation of voltage-stabiliser tube.
3. pulse generating circuit according to claim 1 and 2, is characterized in that, described switch is grammed switch, is by the electronic switch of a Microprocessor S3C44B0X.
4. pulse generating circuit according to claim 2, it is characterized in that, described switch is grammed switch, by the electronic switch of a Microprocessor S3C44B0X, the output of electronic switch is serially connected with a resistance, and when DC power supply connected by electronic switch, DC power supply is connected between straight coupling capacitance and voltage-stabiliser tube by described resistance, when electronic switch disconnects DC power supply, described resistance is attempted by every straight coupling capacitance, between voltage-stabiliser tube and emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520169232.XU CN204442308U (en) | 2015-03-24 | 2015-03-24 | A kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520169232.XU CN204442308U (en) | 2015-03-24 | 2015-03-24 | A kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204442308U true CN204442308U (en) | 2015-07-01 |
Family
ID=53610120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520169232.XU Active CN204442308U (en) | 2015-03-24 | 2015-03-24 | A kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204442308U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370483A (en) * | 2017-08-04 | 2017-11-21 | 深圳市嘉昱机电有限公司 | Pulse receiving circuit |
| CN110729894A (en) * | 2018-07-16 | 2020-01-24 | 杭州国彪超声设备有限公司 | Direct current chopping voltage regulating circuit |
-
2015
- 2015-03-24 CN CN201520169232.XU patent/CN204442308U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370483A (en) * | 2017-08-04 | 2017-11-21 | 深圳市嘉昱机电有限公司 | Pulse receiving circuit |
| CN110729894A (en) * | 2018-07-16 | 2020-01-24 | 杭州国彪超声设备有限公司 | Direct current chopping voltage regulating circuit |
| CN110729894B (en) * | 2018-07-16 | 2020-12-18 | 杭州国彪超声设备有限公司 | Direct current chopping voltage regulating circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102243505B (en) | Low-offset and fast-response voltage-controlled current source, control method and power circuit applying voltage-controlled current source | |
| CN102439831B (en) | Drive device for driving voltage-driven element | |
| CN106710531B (en) | Backlight control circuit and electronic device | |
| CN104135253B (en) | A kind of circuit structure of the high repetitive frequency pulsed current source of narrow spaces | |
| CN2884287Y (en) | Circuit for starting current-source or valtage-source | |
| CN104917376B (en) | DC/DC converter | |
| CN204442308U (en) | A kind of nothing divides gear to switch the quick edge pulse generating circuit of the program-controlled amplitude of link | |
| CN108957360B (en) | Power supply circuit and testing device | |
| CN106992772B (en) | Negative-pressure self-bias PIN switch driver and negative-pressure generation method thereof | |
| CN108063549B (en) | Isolation control circuit | |
| CN102264166B (en) | LED output drive circuit structure and method for providing drive current for LED | |
| CN201230285Y (en) | Driver circuit for synchronous rectifying tube | |
| CN203691282U (en) | Duty-ratio adjustable, period-fixed, and isolation-control bipolarity high-frequency high-voltage pulse power supply circuit | |
| CN203522680U (en) | Time-delay circuit | |
| CN108768356B (en) | Power-on self-locking control circuit and power supply | |
| CN208971372U (en) | Driving circuit applied to DC-DC converter | |
| CN206023567U (en) | Switching Power Supply modulation circuit and Switching Power Supply | |
| CN206442360U (en) | A kind of triggers circuit of non-contact voltage stabilizer controllable silicon | |
| CN219779980U (en) | Switching power supply voltage delay control circuit | |
| CN208241759U (en) | Industrial camera | |
| CN204993059U (en) | Constant voltage power supply's output current control output voltage's circuit | |
| CN216904854U (en) | Synchronous delay switch circuit of bipolar power supply | |
| CN202663370U (en) | Digital controlled analogue modulation circuit | |
| CN210517768U (en) | Power switch circuit with short-circuit protection | |
| CN214959490U (en) | Starting-up control circuit and ultrasonic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |