CN108417193A - A kind of electronic device driving circuit and its high resistance circuit and driving method - Google Patents
A kind of electronic device driving circuit and its high resistance circuit and driving method Download PDFInfo
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- CN108417193A CN108417193A CN201810603267.8A CN201810603267A CN108417193A CN 108417193 A CN108417193 A CN 108417193A CN 201810603267 A CN201810603267 A CN 201810603267A CN 108417193 A CN108417193 A CN 108417193A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
- G10K9/125—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means with a plurality of active elements
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Abstract
The present invention provides a kind of electronic device driving circuits, including：Power circuit, input terminal couple input power；Circuit occurs for crystal oscillation signal, and input terminal couples the output end of power circuit, and output end is for providing square-wave signal；Driving signal output circuit, first input end couple the output end that circuit occurs for crystal oscillation signal, and the second input terminal is used to couple the first end of electronic device for coupling input power, the first output end, and second output terminal is used to couple the second end of electronic device；And high resistant signal generating circuit, its input terminal couples crystal oscillation signal and circuit occurs, the third input terminal of output end coupling driving signal output circuit intermittently carries out resonance for providing high resistant signal, the output signal of the output end of high resistant signal control driving signal output circuit.The driving circuit realizes the driving of electronic device especially piezoelectric buzzer, improves the loudness of buzzer sounding, improves power-efficient, and have higher reliability, realizes system micromation.
Description
Technical field
The present invention relates to electronic circuit fields, and in particular to a kind of electronic device driving circuit and its high resistance circuit.
Background technology
Buzzer drive circuit is used to provide drive signal for the buzzer in numerous sound-producing devices.Piezo buzzer is
A kind of buzzer of capacitive being widely used, by the way that piezoelectric material to be pasted onto on two panels sheet metal.When piezoelectric material and gold
After category piece both ends are applied with pulse voltage, because of inverse piezoelectric effect, piezo just will produce mechanically deform and send out the sound.
As sound-producing device, the loudness of buzzer is an important indicator.
Invention content
For demand in the prior art, an object of the present invention is to provide one kind to be intended to improve piezoelectric buzzer sound
The driving circuit of degree and its high resistance circuit.
To solve the above-mentioned problems, one aspect of the present invention proposes a kind of electronic device driving circuit, including：Power supply
There is circuit input terminal and output end, the wherein input terminal of power circuit to couple input power；Circuit, tool occur for crystal oscillation signal
There are input terminal and output end, wherein crystal oscillation signal that the output end of the input terminal coupling power circuit of circuit, crystal oscillation signal hair occurs
The output end of raw circuit is for providing square-wave signal；Driving signal output circuit has first input end, the second input terminal, the
The output of circuit occurs for the first input end coupling crystal oscillation signal of three input terminals and output end, wherein driving signal output circuit
End, for coupling input power, the output end of driving signal output circuit is used for the second input terminal of driving signal output circuit
Couple electronic device；And high resistant signal generating circuit, there is input terminal and output end, wherein high resistant signal generating circuit is defeated
Enter end coupling crystal oscillation signal and circuit occurs, the third of the output end coupling driving signal output circuit of high resistant signal generating circuit is defeated
Enter end for providing high resistant signal, high resistant signal control the output signal of the output end of driving signal output circuit intermittently into
Row resonance.
In one embodiment, electronic device is piezo buzzer.
In one embodiment, crystal oscillation signal generation circuit includes：Circuit occurs for sawtooth signal, has input terminal and defeated
The output end of the input terminal coupling power circuit of circuit occurs for outlet, wherein sawtooth signal, and circuit occurs for sawtooth signal
Output end provides sawtooth signal；And waveform changing circuit, there is first input end, the second input terminal and output end, wherein
The output end of the first input end coupling power circuit of waveform changing circuit, the second input terminal of waveform changing circuit couple sawtooth
The output end of the output end of wave signal generating circuit, waveform changing circuit provides square-wave signal.
In one embodiment, the output end of circuit occurs for the input terminal coupling sawtooth signal of high resistant signal generating circuit
For receiving sawtooth signal.
In one embodiment, high resistant signal generating circuit includes comparison circuit, comparison circuit comparison reference signal and height
The signal for hindering the input terminal of signal generating circuit, for generating high resistant signal.
In one embodiment, square-wave signal is in the first state in the first level, partly has with high resistant signal
Effect state overlaps, and another part is overlapped with the invalid state of high resistant signal, and wherein the effective status of high resistant signal drives for turning off
Dynamic signal output apparatus.
In one embodiment, driving signal output circuit includes：High resistant control circuit has first input end, second
Input terminal and several output ends, the wherein output of the first input end coupling high resistant signal generating circuit of high resistant control circuit
End, the second input terminal of the second input terminal coupling driving signal output circuit of high resistant control circuit, high resistant control circuit include
The first transistor, the output end of the control terminal coupling high resistant signal generating circuit of the first transistor；And recommend doubleway output electricity
Road has first input end, the second input terminal, several third input terminals, the first output end and second output terminal, wherein recommending
The first input end of the first input end coupling driving signal output circuit of doubleway output circuit, recommends the of doubleway output circuit
Two input terminals couple the second input terminal of driving signal output circuit, recommend several third input terminal couplings of doubleway output circuit
Several output ends for connecing high resistant control circuit recommend the first output end coupling driving signal output circuit of doubleway output circuit
The first output end, recommend doubleway output circuit second output terminal coupling driving signal output circuit second output terminal.
In one embodiment, high resistant control circuit further comprises second transistor and several third transistor,
In：The first end coupling ground of the first transistor, the first end of the second end coupling second transistor of the first transistor, the second crystal
The first end of second end the coupling input power and several third transistor of pipe, the control terminal of second transistor couple several
The control terminal of third transistor, the second input terminal of the first end coupling driving signal output circuit of several third transistor,
Several second ends of several third transistor correspond several output ends of coupling high resistant control circuit.
According to another aspect of the present invention, it is proposed that a kind of high resistant electricity for controlling electronic device driving output circuit
Road, including：Comparison circuit has first input end, the second input terminal and output end, wherein the first input end coupling of comparison circuit
Reference signal is connect, the second input terminal of comparison circuit couples sawtooth signal；And high resistant control circuit, coupling driving stage output
Circuit, high resistant control circuit have first input end, the second input terminal and several output ends, the first of high resistant control circuit defeated
Enter the output end of end coupling comparison circuit, the second input terminal of high resistant control circuit couples power supply signal, high resistant control circuit
Several output ends are for selectively control driving output circuit.
In one embodiment, high resistant control circuit includes the first transistor, and the control terminal coupling of the first transistor is compared
The output end of circuit, several output ends of high resistant control circuit according to the state of driving output circuit for selectively selecting
Property will driving output circuit and power supply signal disconnect.
According to another aspect of the invention, it is proposed that a kind of electronic device driving method, including：Generate square-wave signal；Root
According to square-wave signal or the M signal of generation square-wave signal, high resistant signal is generated；Control electronic device is gone to drive by high resistant signal
Dynamic coupled relation between output circuit and input power；And by driving output circuit that square-wave signal is converted into output signal
Driving electronic device is gone, and the control based on high resistant signal is so that the output signal of driving output circuit intermittently carries out resonance
State.
In one embodiment, electronic device includes piezoelectric buzzer, and output signal includes complementary first of logical relation
Output signal and the second output signal.
In one embodiment, generating square-wave signal includes：Sawtooth signal is generated, and sawtooth signal is converted into
Square-wave signal.
In one embodiment, generating high resistant signal includes：Sawtooth signal is compared with reference signal for producing
Raw high resistant signal.
In one embodiment, control electronic device is gone to drive the coupling between output circuit and input power by high resistant signal
Conjunction relationship further comprises：Control the shutdown or conducting of a transistor by high resistant signal, and according to the shutdown of the transistor or
Coupling or disconnection between conducting control driving output circuit and input power.
The driving circuit of above-mentioned electronic device and its high resistance circuit realize the drive of electronic device especially piezoelectric buzzer
It is dynamic, the loudness of buzzer sounding is improved, power-efficient is improved, and there is higher reliability, it is miniature to realize system
Change.
Description of the drawings
Fig. 1 is the schematic diagram according to the buzzer drive system of one embodiment of the invention；
Fig. 2 is the schematic diagram according to the driving circuit of one embodiment of the invention；
Fig. 3 is the circuit waveform schematic diagram according to one embodiment of the invention；
Fig. 4 is the schematic diagram according to the driving signal output circuit of one embodiment of the invention；
Fig. 5 is the electronic device driving method according to one embodiment of the invention.
Identical label represents same or analogous component or composition in different schematic diagrames.
Specific implementation mode
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that these descriptions are only the feature and advantage further illustrated the present invention, rather than to the claims in the present invention
Limitation.
Just for several typical embodiments, the present invention is not limited merely to the model of embodiment description for the description of the part
It encloses.Same or similar prior art means are replaced mutually with some technical characteristics in embodiment and are also described in the present invention
In the range of protection.
" coupling " in specification includes to be directly connected to, and also includes to be indirectly connected with, as by electrically-conducting medi such as conductor
Connection, wherein the electrically-conducting medi can contain parasitic inductance or parasitic capacitance.It may additionally include achievable same or similar function
By the connection of other active devices or passive device on the basis of purpose, such as by switching, following circuit circuit or component
Connection.
Fig. 1 is the schematic diagram according to the electronic device drive system of one embodiment of the invention.Electronic device drive system packet
Include driving circuit and electronic device 15.Preferably, electronic device 15 includes piezoelectric buzzer 15.Wherein driving circuit includes power supply
Circuit 12, high resistant signal generating circuit 13 and driving signal output circuit 14 occur for circuit 11, crystal oscillation signal.
The input terminal of power circuit 11 couples input power Vcc, and the output end of power circuit 11 provides voltage source.Power supply electricity
Road 11 is used to input voltage Vcc being converted into the voltage source of stable stabilization, and conjunction is provided for circuit 12 to occur for crystal oscillation signal
Suitable power supply.
Circuit 12 occurs for crystal oscillation signal for generating pulse signal SQ, is periodically switched for driving circuit and is applied to buzzer
The voltage at both ends provides basis of signals.Circuit 12 occurs for crystal oscillation signal, and there is input terminal and output end, wherein crystal oscillation signal to occur
The output end of the input terminal coupling power circuit 11 of circuit 12.The output end that circuit 11 occurs for crystal oscillation signal provides square-wave signal
SQ.In the illustrated embodiment, circuit, which occurs, for crystal oscillation signal can also have second output terminal for providing a signal such as sawtooth wave
Signal is to high resistant signal generating circuit 13.In a further embodiment, it is supplied to the signal of high resistant signal generating circuit can be direct
For square-wave signal SQ.
Driving signal output circuit 14 is used to, by the power amplification of square-wave signal SQ, buzzer 15 is driven with this.Driving letter
Number output circuit 14 has first input end, the second input terminal, third input terminal and output end.Specifically, drive signal exports
The output end of circuit 14 may include the first output end for coupling 15 first end of electronic device and couple 15 second end of electronic device
Second output terminal.The output end that circuit 12 occurs for the first input end coupling crystal oscillation signal of wherein driving signal output circuit 14 is used
In receiving square-wave signal SQ, for the second input terminal of driving signal output circuit 14 for coupling input power Vcc, drive signal is defeated
Go out the output end of the third input terminal coupling high resistant signal generating circuit 13 of circuit.The output end coupling of driving signal output circuit 14
Electronic device 15 is connect for driving electronic device 15.Specifically, the first output end OUT1 is used to couple the of electronic device 15
One end, the second output terminal OUT2 of driving signal output circuit 14 are used to couple the second end of electronic device 15.Drive signal is defeated
Go out the voltage that circuit 14 applies checker on piezoelectric buzzer 15 so that buzzer 15 provides the lasting sound.
High resistant signal generating circuit 13 has input terminal and output end, wherein the input terminal coupling of high resistant signal generating circuit 13
It connects crystal oscillation signal and circuit 12 occurs, the third of the output end coupling driving signal output circuit 14 of high resistant signal generating circuit 13 is defeated
Enter end for providing high resistant signal CR, the output signal OUT1 of the output end of high resistant signal CR control driving signal output circuits 14
With OUT2 intermittently resonance.In one embodiment, high resistant signal CR controls the output end of driving signal output circuit 14
Output signal OUT1 and OUT2 carries out resonance in the period at least one of each period.In the illustrated embodiment, high resistant
Signal generating circuit 13 also is used to couple the output end of power circuit 11 with the second input terminal, for electricity to occur for high resistant signal
Road 13 provides power supply.However in other examples, high resistant signal generating circuit may also couple other control source sources.
In a preferred embodiment, electronic device is piezo buzzer.However, in other examples, electronics device
Part may be other kinds of device, it is preferable that be other kinds of capacitive microphone device.
In a preferred embodiment, driving signal output circuit 14 includes recommending doubleway output circuit.
Fig. 2 is the schematic diagram according to the driving circuit of one embodiment of the invention.Driving circuit includes power circuit 21, crystal oscillator
Signal generating circuit 22, high resistant signal generating circuit 23 and driving signal output circuit 24.Power circuit 21 includes a transistor,
Current source and diode.Wherein the control terminal of transistor couples current source, and first end couples input power Vcc, second end
Voltage source to crystal oscillation signal is provided, circuit 22 and high resistant signal generating circuit 23 occurs.In other examples, power circuit
21 may include other types of structure, such as including band gap source of stable pressure.
It includes that circuit and waveform changing circuit occur for sawtooth signal that circuit 22, which occurs, for crystal oscillation signal.Wherein sawtooth signal
The output end of the input terminal coupling power circuit 21 of circuit occurs, the output end that circuit occurs for sawtooth signal provides sawtooth wave letter
Number.In one embodiment, as shown in Fig. 2, it includes current source, the first capacitance C1, comparator that circuit, which occurs, for sawtooth signal
IC1, bleeder circuit and feedback diode.When to the first capacitance C1 chargings, comparator first input end voltage increases, when first
When input terminal voltage rises to the threshold voltage of bleeder circuit offer, comparator inverts after a certain period of time in delay, starts to the
One capacitance C1 electric discharges, comparator first input end voltage reduce.When voltage drops to threshold voltage, after postponing duration again
Secondary reversion, thus generates sawtooth signal.Waveform changing circuit has first input end, the second input terminal and output end, wherein
The output end of the first input end coupling power circuit 21 of waveform changing circuit, the second input terminal coupling saw of waveform changing circuit
The output end of the output end of the output end of tooth wave signal generating circuit, that is, comparator IC1, waveform changing circuit provides square-wave signal
SQ.In one embodiment, it as shown in Fig. 2, waveform changing circuit includes bleeder circuit and comparator IC2, is used for sawtooth wave
The sawtooth signal of signal generating circuit output is converted into square-wave signal.Certainly, in other examples, crystal oscillation signal occurs
The square-wave signal generation circuit of other structures or other kinds of pulse signal generation circuit can be used in circuit.
High resistant signal generating circuit 23 couples crystal oscillation signal and circuit 22 occurs, and circuit 22 occurs by receiving crystal oscillation signal
M signal such as sawtooth signal, the high resistant signal CR for generating control driving output circuit.High resistant signal generating circuit 23
With first input end, the second input terminal and output end, the wherein first input end of high resistant signal generating circuit 23 couple crystal oscillator
The second output terminal of signal generating circuit 22 is for receiving sawtooth signal.Second input terminal coupling of high resistant signal generating circuit 23
The output end for connecing power circuit is used for receiving voltage source.The output end of high resistant signal generating circuit 23 is for providing high resistant signal
CR.In another embodiment, the square wave of 22 output end of circuit occurs by receiving crystal oscillation signal for high resistant signal generating circuit 23
To generate high resistant signal CR.The third input terminal of the output end coupling driving signal output circuit of high resistant signal generating circuit 23 is used
In providing high resistant signal CR, high resistant signal CR controls the output signal OUT1 and OUT2 of the output end of driving signal output circuit 24
Resonance is carried out in the period at least one of each period.
In one embodiment, as shown, the input terminal of high resistant signal generating circuit 23 couples sawtooth signal
The output end (output end of the comparator IC1 illustrated) of circuit is for receiving sawtooth signal.High resistant signal generating circuit 23
Circuit occurs for the reference signal formed including comparison circuit IC3 and by divider resistance, and comparison circuit IC3 compares reverse side (-) and connects
The sawtooth signal of the input terminal for the high resistant signal generating circuit 23 that the reference signal and in-phase end (+) of receipts receive, for generating
High resistant signal CR.In the illustrated embodiment, high resistant signal is square-wave signal.
Driving signal output circuit 24 has the first input end for receiving square-wave signal SQ, receives the of input power Vcc
Two input terminals receive the third input terminal and two output ends OUT1 and OUT2 of high resistant signal CR.Driving signal output circuit
24 include high resistant control circuit and recommending doubleway output circuit 242.High resistant control circuit is by NOT gate and transistor Q1 signals.Work as height
When resistance signal CR is high level, transistor Q1 cut-offs are recommended doubleway output circuit 242 and are controlled by square-wave signal SQ.When high resistant is believed
When number CR is low level, transistor Q1 conductings, transistor Q1 controls are recommended doubleway output circuit 242 and input power Vcc and are disconnected,
The voltage that control is applied to buzzer both ends is in resonant condition.
Fig. 3 is the circuit waveform schematic diagram according to one embodiment of the invention.In the figure, it is followed successively by crystal oscillation signal and circuit occurs
The square-wave signal SQ of output, the high resistant signal CR of high resistant signal generating circuit output, the first output end of driving signal output circuit
Second output signal OUT2 of the first output signal OUT1 and driving signal output circuit the second output terminal output of output.High resistant
Signal CR is also square-wave signal, rise edge delay certain time of the rising edge than square-wave signal SQ of signal CR, under signal CR
Drop simultaneously or slightly has in advance along the failing edge with square-wave signal SQ, and such square-wave signal SQ is in the first level (high level)
It in first state, is partly overlapped with the effective status of high resistant signal CR (high level), i.e., the square-wave signal SQ on the corresponding time
All it is high level with high resistant signal CR；Another part of square-wave signal SQ high level and invalid state (the low electricity of high resistant signal CR
It is flat) it overlaps.In the first state of signal SQ, wherein when high resistant signal CR is effective status (high level), shutdown driving letter
Number output circuit.When driving signal output circuit is turned off, the output end of input power and driving signal output circuit disconnects,
The voltage that piezoelectric buzzer both ends apply at this time is in high-impedance state, will carry out resonance.The resonance will greatly improve buzzer
Loudness, while improving power-efficient.
Fig. 4 is the physical circuit schematic diagram according to the driving signal output circuit of one embodiment of the invention.Drive signal is defeated
Go out circuit to include high resistant control circuit 441 and recommend doubleway output circuit 442.Wherein high resistant control circuit 441 is for receiving height
Signal CR is hindered, and control is recommended doubleway output circuit 442 and periodically disconnected with input power.High resistant control circuit 441 has
First input end, the second input terminal and several output ends, the wherein first input end of high resistant control circuit 441 couple high resistant
For the output end of signal generating circuit for receiving high resistant signal CR, wherein high resistant control circuit includes the first transistor Q1, and first
The output end of the control terminal coupling high resistant signal generating circuit of transistor Q1, the second input terminal coupling of high resistant control circuit 441
Second input terminal of driving signal output circuit is for receiving power source voltage Vcc.Several output ends of high resistant control circuit 441
It is provided by the emitter of transistor Q3, Q4 and Q5.In some embodiments, the output end of high resistant control circuit 441 is not limited to figure
3 shown, may be greater than 3 it is multiple.
Doubleway output circuit 442 is recommended with first input end, the second input terminal, several third input terminals, first defeated
Outlet and second output terminal, wherein recommending the of the first input end coupling driving signal output circuit of doubleway output circuit 442
One input terminal is used to receive crystal oscillation signal and the square-wave signal SQ that the output end of circuit provides occurs, and recommends the of doubleway output circuit
Second input terminal of two input terminals coupling driving signal output circuit recommends doubleway output circuit for receiving power source voltage Vcc
Several output ends of 442 several third input terminals coupling high resistant control circuit 441.Recommend doubleway output circuit 442
First output end of the first output end OUT1 coupling driving signal output circuits is recommended double for providing the first drive signal OUT1
The second output terminal of the second output terminal OUT2 coupling driving signal output circuits of road output circuit is for providing the second driving letter
Number.First drive signal OUT1 and the second drive signal OUT2 loads are used to drive buzzer sounding at buzzer both ends.Work as height
When resistance signal CR is invalid state, transistor Q1 cut-offs, transistor Q3-Q5 conductings are recommended doubleway output circuit 442 and are believed in square wave
Output logic state alternate complementary the first drive signal OUT1 and the second drive signal OUT2 under the driving of number SQ.Work as high resistant
When signal CR is effective status, the control terminal of transistor Q1 conductings, transistor Q2 is in high level state, and transistor Q3-Q5 is cut
Only, several third input terminals of doubleway output circuit 442 are recommended to disconnect with power source voltage Vcc, output end signal OUT1 and
OUT2 enters high resistant suspended state so that the voltage for being applied to buzzer both ends enters resonant condition, thus improves buzzer
Loudness.
In the illustrated embodiment, high resistant control circuit 441 includes the first transistor Q1, second transistor Q2 and several
Third transistor Q3-Q5.First end (emitter) the coupling ground of wherein the first transistor Q1, the second end of the first transistor Q1
(collector) couples the first end (collector) of second transistor Q2, second end (emitter) the coupling input of second transistor Q2
The first end (emitter) of voltage vcc and several third transistor Q3-Q5, the control terminal of second transistor Q2 couple several
Several second ends (collector) of the control terminal of third transistor Q3-Q5, several third transistor Q3-Q5 correspond coupling
It connects several output ends of high resistant control circuit 441 and recommends several third input terminals of doubleway output circuit 442.Thus lead to
The state for crossing control high resistant signal CR intermittently controls drive output signal OUT1 and OUT2 progress resonance, improves buzzer hair
The loudness of sound.
In one embodiment, high resistant signal generating circuit (circuit 13 in such as Fig. 1) and high resistant control circuit (such as Fig. 4
In circuit 441) be referred to as high resistance circuit, for control electronic device driving output circuit output signal intermittently into
Row resonance.
In one embodiment, high resistance circuit includes comparison circuit and high resistant control circuit.Comparison circuit is referring to the ratio in Fig. 2
Compared with device IC3, with first input end, the second input terminal and output end, the first input end coupling ginseng of wherein comparison circuit IC3
Signal is examined, reference signal can be provided by resitstance voltage divider.The second input terminal of comparison circuit IC3 couples sawtooth signal.In Fig. 2
Shown in embodiment, sawtooth signal is the sawtooth signal in circuit to occur by crystal oscillation signal the centre that circuit generates occurs
Signal.Comparison circuit compares sawtooth signal and reference signal, exports high resistant signal.It is sent out by adjusting high resistant signal in Fig. 2
The reference signal that waveform changing circuit inputs in circuit occurs for reference signal and crystal oscillation signal in raw circuit, high resistant signal CR's
Rising edge can be with respect to square-wave signal SQ rise edge delay certain time so that output signal OUT1 is changed by low level
High level makes driving output circuit that resonance occur in high-impedance state again after a certain period of time.
High resistant control circuit is referring to the circuit 441 of Fig. 4, the coupling driving output circuit 442 of high resistant control circuit 441, high resistant
Control circuit 441 has first input end, the second input terminal and several output ends, the first input of high resistant control circuit 441
For the output end of end coupling comparison circuit for receiving high resistant signal CR, wherein high resistant control circuit 441 includes the first transistor Q1,
The output end of the control terminal coupling comparison circuit of the first transistor Q1, the second input terminal of high resistant control circuit 442 couple power supply
Signal Vcc, several output ends (Q3-Q5 collectors side) of high resistant control circuit 441 are for selectively control driving output
Circuit 442.In one embodiment, driving output circuit 442 includes recommending doubleway output circuit.In one embodiment, high
Several output ends of control circuit 441 are hindered for selectively driving state, that is, square wave of output circuit to believe according to electronic device
Number state selectively the output of output circuit 442 and power supply signal Vcc will be driven to disconnect, such as when square-wave signal SQ is by low electricity
Flat turn becomes high level, and high resistant signal CR is changed into high level by low level after a certain period of time so that high resistant control circuit 441
The output signal of several output ends control driving output circuit 442 enters resonant condition.
Fig. 5 shows electronic device driving method according to an embodiment of the invention.This method includes：In first step
501, generate square-wave signal；High resistant is generated according to square-wave signal or the M signal of generation square-wave signal in second step 502
Signal；In third step 503, go control electronic device that the coupling between output circuit and input power is driven to close by high resistant signal
System；And in four steps 504, driving electronic device is gone by driving output circuit that square-wave signal is converted into output signal,
And the control based on high resistant signal is so that the output signal of driving output circuit is intermittently in resonant condition.In this method
Step does not represent temporal sequence, and refers only to sequence in logic.
In one embodiment, electronic device includes piezoelectric buzzer, and output signal includes complementary first of logical relation
Output signal and the second output signal.
In one embodiment, the method for generating square-wave signal includes generating sawtooth signal, and by sawtooth signal
It is converted into square-wave signal.Wherein high resistant signal by sawtooth signal by being compared generation with reference signal.
In one embodiment, control electronic device is gone to drive the coupling between output circuit and input power by high resistant signal
Conjunction relationship further comprises shutdown or conducting that a transistor is controlled by high resistant signal, and according to the shutdown of the transistor or leads
Coupling or disconnection between logical control driving output circuit and input power.
Stable, reliable driving power can be provided by above-described embodiment so that buzzer sounding is stable, loud, tool
There is higher power-efficient.
The circuit and unit of above-described embodiment further couple power ground, but for the ease of and simplify description, with power ground
Connection corresponding to input terminal do not list in the description of foregoing circuit.
The explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (10)
1. a kind of electronic device driving circuit, including：
There is power circuit input terminal and output end, the wherein input terminal of power circuit to couple input power；
Circuit occurs for crystal oscillation signal, and there is input terminal and output end, wherein crystal oscillation signal the input terminal coupling power supply of circuit occurs
The output end of circuit occurs for the output end of circuit, crystal oscillation signal for providing square-wave signal；
Driving signal output circuit, have first input end, the second input terminal, third input terminal and output end, wherein driving letter
The output end of circuit, the second input of driving signal output circuit occur for the first input end coupling crystal oscillation signal of number output circuit
End is for coupling input power, and the output end of driving signal output circuit is for coupling electronic device；And
There is high resistant signal generating circuit input terminal and output end, the wherein input terminal of high resistant signal generating circuit to couple crystal oscillator
Signal generating circuit, the third input terminal of the output end coupling driving signal output circuit of high resistant signal generating circuit is for providing
The output signal of high resistant signal, the output end of high resistant signal control driving signal output circuit intermittently carries out resonance.
2. driving circuit as described in claim 1, wherein electronic device are piezo buzzer.
3. circuit occurs for driving circuit as described in claim 1, wherein crystal oscillation signal：
Circuit occurs for sawtooth signal, and there is input terminal and output end, wherein sawtooth signal the input terminal coupling of circuit occurs
The output end of power circuit, the output end that circuit occurs for sawtooth signal provide sawtooth signal；And
Waveform changing circuit has first input end, the second input terminal and output end, wherein the first input of waveform changing circuit
The output of circuit occurs for the output end of end coupling power circuit, the second input terminal coupling sawtooth signal of waveform changing circuit
The output end at end, waveform changing circuit provides square-wave signal.
4. driving circuit as claimed in claim 3, wherein the input terminal coupling sawtooth signal hair of high resistant signal generating circuit
The output end of raw circuit is for receiving sawtooth signal.
5. driving circuit as described in claim 1, wherein high resistant signal generating circuit include comparison circuit, comparison circuit compares
The signal of the input terminal of reference signal and high resistant signal generating circuit, for generating high resistant signal.
6. driving circuit as described in claim 1, wherein square-wave signal be in the first state in the first level, partly with
The effective status of high resistant signal overlaps, and another part is overlapped with the invalid state of high resistant signal, wherein effective shape of high resistant signal
State is for turning off driving signal output circuit.
7. driving circuit as described in claim 1, wherein driving signal output circuit include：
High resistant control circuit has first input end, the second input terminal and several output ends, wherein high resistant control circuit
First input end couples the output end of high resistant signal generating circuit, and the second input terminal coupling drive signal of high resistant control circuit is defeated
Go out the second input terminal of circuit, high resistant control circuit includes the first transistor, and the control terminal of the first transistor couples high resistant signal
The output end of circuit occurs；And
Recommend doubleway output circuit, have first input end, the second input terminal, several third input terminals, the first output end and
Second output terminal, wherein the first input end of the first input end coupling driving signal output circuit of doubleway output circuit is recommended,
The second input terminal for recommending the second input terminal coupling driving signal output circuit of doubleway output circuit, recommends doubleway output circuit
Several third input terminals coupling high resistant control circuit several output ends, recommend the first output end of doubleway output circuit
The first output end for coupling driving signal output circuit recommends the second output terminal coupling drive signal output of doubleway output circuit
The second output terminal of circuit.
8. driving circuit as claimed in claim 7, wherein high resistant control circuit further comprises second transistor and several
Third transistor, wherein：The first end coupling ground of the first transistor, the of the second end coupling second transistor of the first transistor
One end, the first end of second end the coupling input power and several third transistor of second transistor, the control of second transistor
End processed couples the control terminal of several third transistor, and the first end of several third transistor couples driving signal output circuit
The second input terminal, several second ends of several third transistor correspond coupling high resistant control circuit several are defeated
Outlet.
9. a kind of high resistance circuit for controlling electronic device driving output circuit, including：
Comparison circuit has first input end, the second input terminal and output end, wherein the first input end coupling ginseng of comparison circuit
Signal is examined, the second input terminal of comparison circuit couples sawtooth signal；And
High resistant control circuit, couple driving stage output circuit, if high resistant control circuit have first input end, the second input terminal and
Dry output end, the output end of the first input end coupling comparison circuit of high resistant control circuit, the second of high resistant control circuit are defeated
Enter end coupling power supply signal, several output ends of high resistant control circuit are for selectively control driving output circuit.
10. a kind of electronic device driving method, including：
Generate square-wave signal；
According to square-wave signal or the M signal of generation square-wave signal, high resistant signal is generated；
Control electronic device is gone to drive the coupled relation between output circuit and input power by high resistant signal；And
Driving electronic device is gone by driving output circuit that square-wave signal is converted into output signal, and based on the control of high resistant signal
System is so that the output signal of driving output circuit intermittently carries out resonance.
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| CN201810603267.8A CN108417193B (en) | 2018-06-12 | 2018-06-12 | Electronic device driving circuit, high-resistance circuit thereof and driving method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4215281A (en) * | 1978-02-22 | 1980-07-29 | Supertex, Inc. | Detection circuit and structure therefor |
| JPH02153263A (en) * | 1988-12-02 | 1990-06-12 | Kokusan Denki Co Ltd | Ignition device for internal combustion engine |
| US5343084A (en) * | 1991-04-30 | 1994-08-30 | Sgs-Thomson Microelectronics S.A. | Variable level periodic excitation circuit for a capacitive load |
| US5633625A (en) * | 1995-03-20 | 1997-05-27 | Saturn Electronics & Engineering, Inc. | Electronic chime module and method |
| CN101790122A (en) * | 2010-02-06 | 2010-07-28 | 青岛海信移动通信技术股份有限公司 | Plosive eliminating circuit of audio system and mobile communication terminal |
| CN103973225A (en) * | 2014-05-21 | 2014-08-06 | 北京遥测技术研究所 | High-impedance crystal resonator serial oscillating circuit and commissioning method thereof |
-
2018
- 2018-06-12 CN CN201810603267.8A patent/CN108417193B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4215281A (en) * | 1978-02-22 | 1980-07-29 | Supertex, Inc. | Detection circuit and structure therefor |
| JPH02153263A (en) * | 1988-12-02 | 1990-06-12 | Kokusan Denki Co Ltd | Ignition device for internal combustion engine |
| US5343084A (en) * | 1991-04-30 | 1994-08-30 | Sgs-Thomson Microelectronics S.A. | Variable level periodic excitation circuit for a capacitive load |
| US5633625A (en) * | 1995-03-20 | 1997-05-27 | Saturn Electronics & Engineering, Inc. | Electronic chime module and method |
| CN101790122A (en) * | 2010-02-06 | 2010-07-28 | 青岛海信移动通信技术股份有限公司 | Plosive eliminating circuit of audio system and mobile communication terminal |
| CN103973225A (en) * | 2014-05-21 | 2014-08-06 | 北京遥测技术研究所 | High-impedance crystal resonator serial oscillating circuit and commissioning method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 黄文成, 舒丹: "电容扬声器及其阻抗匹配网络", 电声技术, no. 03 * |
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