CN204794936U - Reset circuit and electronic equipment - Google Patents
Reset circuit and electronic equipment Download PDFInfo
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- CN204794936U CN204794936U CN201520377760.4U CN201520377760U CN204794936U CN 204794936 U CN204794936 U CN 204794936U CN 201520377760 U CN201520377760 U CN 201520377760U CN 204794936 U CN204794936 U CN 204794936U
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Abstract
The utility model provides a reset circuit, include: charging circuit for after receiving the voltage signal that provides of control port, produce the 2nd voltage signal, drive circuit for after the value that detects the 2nd voltage signal reaches the default, amplify the 2nd voltage signal, and the 2nd voltage signal after will amplifying export for implementation of circuit, implementation of circuit for it will to produce reset signal after receiving the 2nd voltage signal after amplifying reset signal sends the port that restores to the throne to. The utility model also provides an electronic equipment, including above -mentioned reset circuit, button and microcontroller, the control port provides a voltage signal when the button is pressed down, the port that restores to the throne when receiving reset signal, carries out reset operation to microcontroller. Adopt the embodiment of the utility model provides a, need not to occupy alone a button and carry out reset operation specially, can realize its reset function through pressing the mode that has the button to need not to utilize outside instrument, also effectively avoided the mistake to touch.
Description
Technical field
The utility model relates to electronic equipment, particularly relates to a kind of reset circuit in electronic equipment.
Background technology
General all with reset function on an electronic device, when electronic equipment is because of the time of deadlock when misoperation or interiors of products go wrong, needs to start this reset function, namely can, when not power-off, make electronic equipment return to initial condition.In prior art, the reset in electronic equipment adopts this implementation of the toggle switch of independent reset key or power-off more.The such as equipment such as cell phone apparatus and MP3, MP4 is generally realized by reset hole, but this mode needs user to probe into reset hole by tiny instrument to be tapped and just can complete reset, if there is no suitable external tool, cannot reset be triggered, use very inconvenient.Also attempt by increasing extra reset key to realize in the equipment such as some panel computer, but the shortcoming of this mode is the appearance design that extra reset key can affect equipment, and independent reset key in routine use easily by false triggering, encounter because of carelessness and equipment will be caused to restart, make troubles to user.
Utility model content
The utility model embodiment provides a kind of reset circuit, without the need to carrying out larger change to the structure of electronic equipment and outward appearance, utilizing existing button, can realize resetting, without using external tool, and effectively prevent false touch by pressing keys.
The utility model embodiment provides a kind of reset circuit, and described reset circuit comprises: charging circuit, drive circuit, executive circuit, control port and reseting port; Described charging circuit, its input is connected with described control port, and output is connected with described drive circuit, for after receiving the first voltage signal that described control port provides, produces the second voltage signal; Described drive circuit, its input is connected with the output of described charging circuit, output is connected with described executive circuit, for after detecting that the value of described second voltage signal reaches preset value, amplify described second voltage signal, and described second voltage signal after amplifying is exported to described executive circuit; Described executive circuit, its input is connected with the output of described drive circuit, and output is connected with described reseting port, for producing reset signal after described second voltage signal after receiving amplification and sending described reset signal to described reseting port.
Wherein, described reset circuit also comprises anti-phase discharge circuit; Described anti-phase discharge circuit, its input is connected with described control port, and output is connected with the output of described charging circuit, for producing the 4th voltage signal after receiving the tertiary voltage signal that described control port provides.
Wherein, described charging circuit comprises: resistance R4 and electric capacity C1; Described resistance R4 and electric capacity C1 connects and forms series arm, and one end of described series arm is the input of described charging circuit, and the other end is the output of described charging circuit.
Wherein, described drive circuit comprises: metal-oxide-semiconductor and the first feeder ear; The grid of described metal-oxide-semiconductor is the input of described drive circuit, and the source electrode of described metal-oxide-semiconductor is the output of described drive circuit; Described metal-oxide-semiconductor, its grid connects the output of described charging circuit and the output of described anti-phase discharge circuit, and source electrode connects the input of described executive circuit, described source electrode also ground connection, and drain electrode connects described first feeder ear.
Wherein, described executive circuit comprises: triode Q3, electric capacity C2 and the second feeder ear; The base stage of described triode Q3 is the input of described executive circuit, the output of the very described executive circuit of current collection of described triode Q3; Described triode Q3, its base stage connects the output of described drive circuit, and collector electrode passes through described electric capacity C2 ground connection, grounded emitter; Described second feeder ear is by described electric capacity C2 ground connection.
Wherein, described anti-phase discharge circuit comprises triode Q1, triode Q2 and the 3rd feeder ear; The base stage of described triode Q1 is the input of described anti-phase discharge circuit, the output of the very described anti-phase discharge circuit of current collection of described triode Q2; Described triode Q1, its base stage connects described control port, and collector electrode connects the base stage of described triode Q2, grounded emitter; Described triode Q2, its base stage connects the collector electrode of described triode Q1, and collector electrode connects the output of described charging circuit and the input of described drive circuit, grounded emitter; Described 3rd feeder ear connects the collector electrode of described triode Q1.
Wherein, described drive circuit also comprises divider resistance R6 and divider resistance R7; Described metal-oxide-semiconductor, its drain electrode is connected to described first feeder ear through described divider resistance R6, and source electrode is by described divider resistance R7 ground connection.
Wherein, described executive circuit also comprises: divider resistance R8 and divider resistance R9; Described triode Q3, its base stage is connected to the output of described drive circuit through described divider resistance R8, and collector electrode connects the output of described charging circuit, grounded emitter; Described second feeder ear is by described divider resistance R9 and electric capacity C2 ground connection.
Wherein, described anti-phase discharge circuit also comprises: divider resistance R2, divider resistance R3, divider resistance R5; Described triode Q1, its base stage is connected to described control port through described divider resistance R2, and collector electrode is connected to the base stage of described triode Q2 through described divider resistance R5; Described 3rd feeder ear is connected to the collector electrode of described triode Q1 through described divider resistance R3.
The utility model embodiment also provides a kind of electronic equipment, comprises above-mentioned reset circuit, button and microcontroller, and described control port provides described first voltage signal when described button is pressed; Described reseting port, when receiving described reset signal, carries out reset operation to described microcontroller.
Implement the utility model embodiment, there is following beneficial effect: the utility model devises a kind of reset circuit, when reset circuit is applied in the electronic equipment comprising button and microcontroller, control port is made to provide the first voltage signal if button is pressed, the second voltage signal can be produced after so charging circuit receives the first voltage signal, after utilizing drive circuit to detect that the value of the second voltage signal reaches preset value, amplify the second voltage signal and the second voltage signal after amplifying is exported to executive circuit, produce reset signal after second voltage signal of executive circuit after receiving amplification and send reseting port to, reseting port is when receiving reset signal, reset operation is carried out to microcontroller.Adopt the utility model embodiment, when needs carry out reset operation, without the need to carrying out larger change to the structure of electronic equipment and outward appearance, also need not take separately a button and carry out reset operation specially, utilize the existing button of electronic equipment, its reset function can be realized by the mode of pressing keys, and without using external tool, also effectively prevent false touch.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment technical scheme, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the electrical block diagram of the first embodiment of a kind of reset circuit that the utility model embodiment provides;
Fig. 2 is the circuit theory schematic diagram of the second embodiment of a kind of reset circuit that the utility model embodiment provides;
Fig. 3 is the circuit theory schematic diagram of the 3rd embodiment of a kind of reset circuit that the utility model embodiment provides;
Fig. 4 is the structural representation of a kind of electronic equipment that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Below in conjunction with Fig. 1, Fig. 2, a kind of reset circuit that the utility model embodiment provides is described.
Refer to Fig. 1, Fig. 1 is the first example structure schematic diagram of the reset circuit that the utility model embodiment provides.
Reset circuit described in the present embodiment, comprising: charging circuit 101, drive circuit 102, executive circuit 103, control port 110 and reseting port 120.Specific as follows:
Charging circuit 101, its input is connected with described control port 110, and output is connected with described drive circuit 102, for after receiving the first voltage signal that described control port 110 provides, produces the second voltage signal;
Drive circuit 102, its input is connected with the output of described charging circuit 101, output is connected with described executive circuit 102, for after detecting that the value of described second voltage signal reaches preset value, amplify described second voltage signal, and described second voltage signal after amplifying is exported to described executive circuit 103;
Executive circuit 103, its input is connected with the output of described drive circuit 102, output is connected with described reseting port 120, for producing reset signal after described second voltage signal after receiving amplification and sending described reset signal to described reseting port 120.
In the utility model embodiment, described first voltage signal is high level signal, and described second voltage signal is the level signal after electric capacity C1 charges.Particularly, control port 110 and the electronic equipment that the utility model can be provided are integrated in one, when carrying out button operation on an electronic device, the first voltage signal can be provided by trigging control port 110, the second voltage signal can be produced after charging circuit 101 receives the first voltage signal, when the value of the second voltage signal reaches preset value, drive circuit 102 can amplify the second voltage signal and the second voltage signal after amplifying is exported to executive circuit 103, produce reset signal after second voltage signal of executive circuit 103 after receiving amplification and send reseting port 120 to.Particularly, described button operation can be pin a certain button to reach Preset Time, or pins the combination of several button simultaneously.Or described button operation also can replace with knob-operated, contact action etc., and the utility model is not restricted this.
The structural representation of the second embodiment of the reset circuit provided for the utility model embodiment see Fig. 2, Fig. 2.
Reset circuit described in the present embodiment, comprising: charging circuit 101, drive circuit 102, executive circuit 103, control port 110 and reseting port 120.Specific as follows:
Described charging circuit 101, its input is connected with described control port 110, and output 110 is connected with described drive circuit 102, for after receiving the first voltage signal that described control port 110 provides, produces the second voltage signal;
Concrete, described charging circuit 101, comprises resistance R4 and electric capacity C1; Wherein, described resistance R4 and electric capacity C1 connects and forms series arm, and one end of described series arm is the input of described charging circuit 101, and the other end is the output of described charging circuit 101.
Further, described charging circuit 101 also comprises divider resistance R1, and described control port 110 is by described divider resistance R1 ground connection.
In the utility model embodiment, described first voltage signal is high level signal, and described second voltage signal is the level signal after electric capacity C1 charges.Particularly, control port 110 and the electronic equipment that the utility model can be provided are integrated in one, and when carrying out button operation on an electronic device, can provide a high level signal by trigging control port 110, charge to electric capacity C1 through resistance R1, the level value of electric capacity C1 is raised gradually.Described button operation can be pin a certain button to reach Preset Time, or pins the combination of several button simultaneously.Or described button operation also can replace with knob-operated, contact action etc., and the utility model is not restricted this.
Described drive circuit 102, its input is connected with the output of described charging circuit 101, output is connected with described executive circuit 103, for after detecting that the value of described second voltage signal reaches preset value, amplify described second voltage signal, and described second voltage signal after amplifying is exported to described executive circuit 103;
Particularly, described drive circuit 102 comprises: metal-oxide-semiconductor and the first feeder ear; The grid of described metal-oxide-semiconductor is the input of described drive circuit 102, and the source electrode of described metal-oxide-semiconductor is the output of described drive circuit 102; Described metal-oxide-semiconductor, its grid connects the output of described charging circuit 101 and the output of described anti-phase discharge circuit, and source electrode connects the input of described executive circuit 103, described source electrode also ground connection, and drain electrode connects described first feeder ear.
Further, described drive circuit 102 also comprises divider resistance R6 and divider resistance R7; Described metal-oxide-semiconductor, its drain electrode is connected to described first feeder ear through described divider resistance R6, and source electrode is by described divider resistance R7 ground connection.
In the utility model embodiment, when the level value of electric capacity C1 is elevated to preset value, the metal-oxide-semiconductor conducting of drive circuit 102, now metal-oxide-semiconductor exports to described executive circuit 103 after the above-mentioned level signal reaching the electric capacity C1 of preset value can being amplified.Under normal circumstances, because the value of divider resistance R1 is comparatively large, the driving force of charging circuit 101 is more weak, is transferred to described executive circuit 103 so need to arrange after the level signal reaching the electric capacity C1 of preset value is amplified by drive circuit 102.In the utility model embodiment, be utilize metal-oxide-semiconductor to carry out threshold test and amplification level signal.
Described executive circuit 103, its input is connected with the output of described drive circuit 102, output is connected with described reseting port 120, for producing reset signal after described second voltage signal after receiving amplification and sending described reset signal to described reseting port 120.
Particularly, described executive circuit 103 comprises: triode Q3, electric capacity C2 and the second feeder ear; The base stage of described triode Q3 is the input of described executive circuit 103, the output of the very described executive circuit 103 of current collection of described triode Q3; Described triode Q3, its base stage connects the output of described drive circuit 102, and collector electrode passes through described electric capacity C2 ground connection, grounded emitter; Described second feeder ear is by described electric capacity C2 ground connection.
Further, described executive circuit 103 also comprises: divider resistance R8 and divider resistance R9; Described triode Q3, its base stage is connected to the output of described drive circuit 102 through described divider resistance R8, and collector electrode connects the output of described charging circuit 101, grounded emitter; Described second feeder ear is by described divider resistance R9 and electric capacity C2 ground connection.
In the present embodiment, before control port provides the first voltage signal, the second feeder ear is charged to electric capacity C2 by resistance R9; After control port provides the first voltage signal, the source voltage of metal-oxide-semiconductor Q4 continues to raise until make triode Q3 conducting, and now electric capacity C2 discharges, and electric capacity C2 can produce low level reset signal after discharging, institute's reset signal is transmitted to reseting port 120, thus carries out reset operation.
As an optional execution mode, in the utility model embodiment, described reset circuit can also comprise anti-phase discharge circuit 104; Described anti-phase discharge circuit 104, its input is connected with described control port 110, and output is connected with the output of described charging circuit 101, for producing the 4th voltage signal after receiving the tertiary voltage signal that described control port 110 provides.
Particularly, described anti-phase discharge circuit 104 comprises triode Q1, triode Q2 and the 3rd feeder ear; The base stage of described triode Q1 is the input of described anti-phase discharge circuit 104, the output of the very described anti-phase discharge circuit 104 of current collection of described triode Q2; Described triode Q1, its base stage connects described control port 110, and collector electrode connects the base stage of described triode Q2, grounded emitter; Described triode Q2, its base stage connects the collector electrode of described triode Q1, and collector electrode connects the output of described charging circuit 101 and the input of described drive circuit 102, grounded emitter; Described 3rd feeder ear connects the collector electrode of described triode Q1.
Further, described anti-phase discharge circuit 104 also comprises: divider resistance R2, divider resistance R3, divider resistance R5; Described triode Q1, its base stage is connected to described control port 110 through described divider resistance R2, and collector electrode is connected to the base stage of described triode Q2 through described divider resistance R5; Described 3rd feeder ear is connected to the collector electrode of described triode Q1 through described divider resistance R3.
In the present embodiment, tertiary voltage signal is low level signal; When control port provides high level signal, the triode Q1 conducting of anti-phase discharge circuit, and triode Q2 ends, now anti-phase discharge circuit to charging circuit without effect; And when control port provides low level signal, electric capacity C1 stops charging, now triode Q1 ends, triode Q2 conducting, and anti-phase discharge circuit can produce the 4th voltage signal to described electric capacity C1, discharge operation is carried out to electric capacity C1, the level signal value of electric capacity C1 quickly falls to and is less than preset value, and metal-oxide-semiconductor and triode Q3 are ended rapidly, and electric capacity C2 is continued charging, recover high level gradually, thus terminate reset mode.Anti-phase discharge circuit 104 is set, repid discharge can be carried out to electric capacity C1, thus terminate reset mode.Prevent the reset enable signal reseting port 120 because continuing from constantly carrying out reset operation to microcontroller.
Do one below in conjunction with the operation principle of Fig. 2 to a kind of reset circuit that the utility model embodiment provides to introduce in detail.
Described first voltage signal is high level signal, and described second voltage signal is the level signal after electric capacity C1 charges, and described 3rd signal is low level signal.When control port provides high level signal, in the charge circuit, charged to electric capacity C1 by resistance R4, and now triode Q1 conducting, triode Q2 ends, and anti-phase discharge circuit is without effect; When the level value of the electric capacity C1 after charging reaches preset value, the metal-oxide-semiconductor conducting of drive circuit is (concrete, when the grid of metal-oxide-semiconductor reaches 1.1V or 1.2V than the pressure reduction of source electrode, MOS gets final product conducting), the source level of metal-oxide-semiconductor continues to raise, when the source voltage of metal-oxide-semiconductor reaches certain value (generally more than 0.5V), triode Q3 conducting, now electric capacity C2 can discharge and produce low level reset signal, when reseting port receives reset signal, reset operation can be carried out; When control port produces low level signal, electric capacity C1 stops charging, and now triode Q1 ends, triode Q2 conducting, and electric capacity C2 discharges, and metal-oxide-semiconductor and triode Q3 end rapidly, and electric capacity C2 is continued charging, can not continue to send reset signal.
In the present embodiment, tertiary voltage signal is low level signal, anti-phase discharge circuit 104, and its input is connected with described control port 110, output is connected with the output of described charging circuit 101, when control port 110 provides a low level signal, now electric capacity C1 stops charging, and anti-phase discharge circuit 104 can discharge to described electric capacity C1, the level signal value of C1 declines rapidly, and reset signal is also decontroled, recover high level gradually, thus terminate reset mode.
The structural representation of the 3rd embodiment of the reset circuit provided for the utility model see Fig. 3, Fig. 3.
Reset circuit described in the present embodiment, comprising: charging circuit 101, drive circuit 102, executive circuit 103, control port 110 and reseting port 120.Specific as follows:
Described charging circuit 101, its input is connected with described control port 110, and output 110 is connected with described drive circuit 102, for after receiving the first voltage signal that described control port 110 provides, produces the second voltage signal;
Concrete, described charging circuit 101, comprises resistance R4 and electric capacity C1; Wherein, described resistance R4 and electric capacity C1 connects and forms series arm, and one end of described series arm is the input of described charging circuit 101, and the other end is the output of described charging circuit 101.
Further, described charging circuit 101 also comprises divider resistance R1, and described control port 110 is by described divider resistance R1 ground connection.
In the utility model embodiment, described first voltage signal is high level signal, and described second voltage signal is the level signal after electric capacity C1 charges.Particularly, control port 110 and the electronic equipment that the utility model can be provided are integrated in one, and when carrying out button operation on an electronic device, can provide a high level signal by trigging control port 110, charge to electric capacity C1 through resistance R1, the level of electric capacity C1 is raised gradually.Described button operation can be pin a certain button to reach Preset Time, or pins the combination of several button simultaneously.Or described button operation also can replace with knob-operated, contact action etc., and the utility model is not restricted this.
Described drive circuit 102, its input is connected with the output of described charging circuit 101, output is connected with described executive circuit 103, for after detecting that the value of described second voltage signal reaches preset value, amplify described second voltage signal, and described second voltage signal after amplifying is exported to described executive circuit 103;
Particularly, described drive circuit 102 comprises: metal-oxide-semiconductor Q4 and the first feeder ear; The grid of described metal-oxide-semiconductor Q4 is the input of described drive circuit 102, and the source electrode of described metal-oxide-semiconductor Q4 is the output of described drive circuit 102; Described metal-oxide-semiconductor Q4, its grid connects the output of described charging circuit 101 and the output of described anti-phase discharge circuit, and source electrode connects the input of described executive circuit 103, described source electrode also ground connection, and drain electrode connects described first feeder ear.
Further, described drive circuit 102 also comprises divider resistance R6 and divider resistance R7; Described metal-oxide-semiconductor Q4, its drain electrode is connected to described first feeder ear through described divider resistance R6, and source electrode is by described divider resistance R7 ground connection.
In the utility model embodiment, when the value of the level signal of electric capacity C1 is elevated to preset value, the metal-oxide-semiconductor Q4 conducting of drive circuit 102, now metal-oxide-semiconductor Q4 exports to described executive circuit 103 after the above-mentioned level signal reaching the electric capacity C1 of preset value can being amplified.Under normal circumstances, because the value of divider resistance R1 is comparatively large, the driving force of charging circuit 101 is more weak, is transferred to described executive circuit 103 so need to arrange after the level signal reaching the electric capacity C1 of preset value is amplified by drive circuit 102.In the utility model embodiment, be utilize metal-oxide-semiconductor to carry out threshold test and amplification level signal.
Described executive circuit 103, its input is connected with the output of described drive circuit 102, output is connected with described reseting port 120, for producing reset signal after described second voltage signal after receiving amplification and sending described reset signal to described reseting port 120.
Particularly, described executive circuit 103 comprises: field effect transistor Q3, electric capacity C2 and the second feeder ear; The grid of described field effect transistor Q3 is the input of described executive circuit 103, and the drain electrode of described field effect transistor Q3 is the output of described executive circuit 103; Described field effect transistor Q3, its grid connects the output of described drive circuit 102, drains by described electric capacity C2 ground connection, source ground; Described second feeder ear is by described electric capacity C2 ground connection.
Further, described executive circuit 103 also comprises: divider resistance R8 and divider resistance R9; Described field effect transistor Q3, its grid is connected to the output of described drive circuit 102 through described divider resistance R8, and drain electrode connects the output of described charging circuit 101, source ground; Described second feeder ear is by described divider resistance R9 and electric capacity C2 ground connection.
In the present embodiment, before control port provides the first voltage signal, the second feeder ear is charged to electric capacity C2 by resistance R9; After control port provides the first voltage signal, the source voltage of metal-oxide-semiconductor Q4 continues to raise until make field effect transistor Q3 conducting, and now electric capacity C2 discharges, and electric capacity C2 produces low level reset signal after discharging, institute's reset signal is transmitted to institute's reseting port 120, thus carries out reset operation.
As an optional execution mode, in the utility model embodiment, described reset circuit can also comprise anti-phase discharge circuit 104; Described anti-phase discharge circuit 104, its input is connected with described control port 110, and output is connected with the output of described charging circuit 101, for producing the 4th voltage signal after receiving the tertiary voltage signal that described control port 110 provides.
Particularly, described anti-phase discharge circuit 104 comprises field effect transistor Q1, field effect transistor Q2 and the 3rd feeder ear; The grid of described field effect transistor Q1 is the input of described anti-phase discharge circuit 104, and the drain electrode of described field effect transistor Q2 is the output of described anti-phase discharge circuit 104; Described field effect transistor Q1, its grid connects described control port 110, and drain electrode connects the grid of described field effect transistor Q2, source ground; Described field effect transistor Q2, its grid connects the drain electrode of described field effect transistor Q1, and drain electrode connects the output of described charging circuit 101 and the input of described drive circuit 102, source ground; Described 3rd feeder ear connects the drain electrode of described field effect transistor Q1.
Further, described anti-phase discharge circuit 104 also comprises: divider resistance R2, divider resistance R3, divider resistance R5; Described field effect transistor Q1, its grid is connected to described control port 110 through described divider resistance R2, drains and is connected to the grid of described field effect transistor Q2 through described divider resistance R5; Described 3rd feeder ear is connected to the drain electrode of described field effect transistor Q1 through described divider resistance R3.
In the present embodiment, tertiary voltage signal is low level signal; When control port provides high level signal, the field effect transistor Q1 conducting of anti-phase discharge circuit, and field effect transistor Q2 cut-off, now anti-phase discharge circuit to charging circuit without effect; And when control port provides low level signal, electric capacity C1 stops charging, now field effect transistor Q1 cut-off, field effect transistor Q2 conducting, anti-phase discharge circuit can produce the 4th voltage signal to described electric capacity C1, discharge operation is carried out to electric capacity C1, the level signal value of electric capacity C1 quickly falls to and is less than preset value, and metal-oxide-semiconductor and field effect transistor Q3 are ended rapidly, and electric capacity C2 is continued charging, recover high level gradually, thus terminate reset mode.Anti-phase discharge circuit 104 is set, repid discharge can be carried out to electric capacity C1, thus terminate reset mode.Prevent the reset enable signal reseting port 120 because continuing from constantly carrying out reset operation to microcontroller.
See the structural representation of a kind of electronic equipment that Fig. 4, Fig. 4 provide for the utility model embodiment.
A kind of electronic equipment provided in the utility model embodiment, comprise the reset circuit 100 in above-mentioned first embodiment or the second embodiment or the 3rd embodiment, also comprise button 200 and microcontroller 300, described control port 110 provides described first voltage signal when described button 200 is pressed; Described reseting port 120, when receiving described reset signal, carries out reset operation to described microcontroller 300.
When reset circuit 100 is applied in the electronic equipment comprising button 200 and microcontroller 300, if operated button 200, control port 110 is made to provide the first voltage signal, the second voltage signal can be produced after so charging circuit 101 receives the first voltage signal, when the value of the second voltage signal reaches preset value, drive circuit 102 can amplify the second voltage signal and the second voltage signal after amplifying is exported to executive circuit 103, produce reset signal after second voltage signal of executive circuit 103 after receiving amplification and send reseting port 120 to, reseting port 120 can with electronic equipment treats that reposition element is connected, in the utility model embodiment, treat that reposition element is microcontroller.When reseting port 120 receives reset signal, reset operation can be carried out to microcontroller.Wherein, button 200 can be the combination of touch-switch or several touch-switch.Can be pin a certain touch-switch to reach Preset Time to the operation of button 200, or pin the combination of certain several touch-switch simultaneously, now described control port 110 provides described first voltage signal.Or described button operation also can replace with knob-operated, contact action etc., and the utility model is not restricted this.
It should be noted that, in the application scenarios of the present embodiment, when pushing button, produce high level signal, when unclamping button, produce low level signal.Reset circuit in the utility model embodiment can be applied in different electronic equipments, and in the present embodiment, reset circuit is applied on earphone power amplifier, carries out reset operation to the microcontroller of earphone power amplifier.
Implement the utility model embodiment, there is following beneficial effect: the utility model devises a kind of reset circuit, when reset circuit is applied in the electronic equipment comprising button and microcontroller, control port is made to provide the first voltage signal if button is pressed, the second voltage signal can be produced after so charging circuit receives the first voltage signal, after utilizing drive circuit to detect that the value of the second voltage signal reaches preset value, amplify the second voltage signal and the second voltage signal after amplifying is exported to executive circuit, produce reset signal after second voltage signal of executive circuit after receiving amplification and send reseting port to, reseting port is when receiving reset signal, reset operation is carried out to microcontroller.Meanwhile, arrange the level signal that drive circuit 102 will reach the electric capacity C1 of preset value and amplify, avoid occurring that the value because of divider resistance R1 is comparatively large, the driving force of charging circuit 101 is more weak and cannot carry out situation about driving.Further, anti-phase discharge circuit 104 is set, repid discharge can be carried out to electric capacity C1, thus terminate reset mode.Prevent the reset enable signal reseting port 120 because continuing from constantly carrying out reset operation to microcontroller.Adopt the utility model embodiment, when needs carry out reset operation, without the need to carrying out larger change to the structure of electronic equipment and outward appearance, also need not take separately a button and carry out reset operation specially, utilize the existing button of electronic equipment, its reset function can be realized by the mode of pressing keys, and without using external tool, also effectively prevent false touch.
Above disclosedly be only the utility model preferred embodiment, certainly can not limit the interest field of the utility model with this, therefore according to the equivalent variations that the utility model claim is done, still belong to the scope that the utility model is contained.
Claims (10)
1. a reset circuit, is characterized in that, described reset circuit comprises: charging circuit, drive circuit, executive circuit, control port and reseting port;
Described charging circuit, its input is connected with described control port, and output is connected with described drive circuit, for after receiving the first voltage signal that described control port provides, produces the second voltage signal;
Described drive circuit, its input is connected with the output of described charging circuit, output is connected with described executive circuit, for after detecting that the value of described second voltage signal reaches preset value, amplify described second voltage signal, and described second voltage signal after amplifying is exported to described executive circuit;
Described executive circuit, its input is connected with the output of described drive circuit, and output is connected with described reseting port, for producing reset signal after described second voltage signal after receiving amplification and sending described reset signal to described reseting port.
2. reset circuit according to claim 1, is characterized in that, described reset circuit also comprises anti-phase discharge circuit;
Described anti-phase discharge circuit, its input is connected with described control port, and output is connected with the output of described charging circuit, for producing the 4th voltage signal after receiving the tertiary voltage signal that described control port provides.
3. reset circuit according to claim 2, is characterized in that, described charging circuit comprises: resistance R4 and electric capacity C1;
Described resistance R4 and electric capacity C1 connects and forms series arm, and one end of described series arm is the input of described charging circuit, and the other end is the output of described charging circuit.
4. reset circuit according to claim 3, is characterized in that, described drive circuit comprises: metal-oxide-semiconductor and the first feeder ear;
The grid of described metal-oxide-semiconductor is the input of described drive circuit, and the source electrode of described metal-oxide-semiconductor is the output of described drive circuit;
Described metal-oxide-semiconductor, its grid connects the output of described charging circuit and the output of described anti-phase discharge circuit, and source electrode connects the input of described executive circuit, described source electrode also ground connection, and drain electrode connects described first feeder ear.
5. reset circuit according to claim 4, is characterized in that, described executive circuit comprises: triode Q3, electric capacity C2 and the second feeder ear;
The base stage of described triode Q3 is the input of described executive circuit, the output of the very described executive circuit of current collection of described triode Q3;
Described triode Q3, its base stage connects the output of described drive circuit, and collector electrode passes through described electric capacity C2 ground connection, grounded emitter;
Described second feeder ear is by described electric capacity C2 ground connection.
6. reset circuit according to claim 4, is characterized in that, described anti-phase discharge circuit comprises triode Q1, triode Q2 and the 3rd feeder ear;
The base stage of described triode Q1 is the input of described anti-phase discharge circuit, the output of the very described anti-phase discharge circuit of current collection of described triode Q2;
Described triode Q1, its base stage connects described control port, and collector electrode connects the base stage of described triode Q2, grounded emitter;
Described triode Q2, its base stage connects the collector electrode of described triode Q1, and collector electrode connects the output of described charging circuit and the input of described drive circuit, grounded emitter;
Described 3rd feeder ear connects the collector electrode of described triode Q1.
7. reset circuit according to claim 4, is characterized in that, described drive circuit also comprises divider resistance R6 and divider resistance R7;
Described metal-oxide-semiconductor, its drain electrode is connected to described first feeder ear through described divider resistance R6, and source electrode is by described divider resistance R7 ground connection.
8. reset circuit according to claim 5, is characterized in that, described executive circuit also comprises: divider resistance R8 and divider resistance R9;
Described triode Q3, its base stage is connected to the output of described drive circuit through described divider resistance R8, and collector electrode connects the output of described charging circuit, grounded emitter;
Described second feeder ear is by described divider resistance R9 and electric capacity C2 ground connection.
9. reset circuit according to claim 6, is characterized in that, described anti-phase discharge circuit also comprises: divider resistance R2, divider resistance R3, divider resistance R5;
Described triode Q1, its base stage is connected to described control port through described divider resistance R2, and collector electrode is connected to the base stage of described triode Q2 through described divider resistance R5;
Described 3rd feeder ear is connected to the collector electrode of described triode Q1 through described divider resistance R3.
10. an electronic equipment, is characterized in that, comprises the reset circuit according to any one of claim 1 to 10, button and microcontroller,
Described control port provides described first voltage signal when described button is pressed;
Described reseting port, when receiving described reset signal, carries out reset operation to described microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520377760.4U CN204794936U (en) | 2015-06-03 | 2015-06-03 | Reset circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520377760.4U CN204794936U (en) | 2015-06-03 | 2015-06-03 | Reset circuit and electronic equipment |
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| Publication Number | Publication Date |
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| CN204794936U true CN204794936U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520377760.4U Expired - Fee Related CN204794936U (en) | 2015-06-03 | 2015-06-03 | Reset circuit and electronic equipment |
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| CN (1) | CN204794936U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953992A (en) * | 2015-06-03 | 2015-09-30 | 广东欧珀移动通信有限公司 | Reset circuit and electronic equipment |
| CN114690876A (en) * | 2022-03-17 | 2022-07-01 | 中汽创智科技有限公司 | System state monitoring reset circuit |
-
2015
- 2015-06-03 CN CN201520377760.4U patent/CN204794936U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953992A (en) * | 2015-06-03 | 2015-09-30 | 广东欧珀移动通信有限公司 | Reset circuit and electronic equipment |
| WO2016192672A1 (en) * | 2015-06-03 | 2016-12-08 | 广东欧珀移动通信有限公司 | Reset circuit and electronic device |
| CN104953992B (en) * | 2015-06-03 | 2017-08-08 | 广东欧珀移动通信有限公司 | A kind of reset circuit and electronic equipment |
| US10014854B2 (en) | 2015-06-03 | 2018-07-03 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Reset circuit and electronic device |
| CN114690876A (en) * | 2022-03-17 | 2022-07-01 | 中汽创智科技有限公司 | System state monitoring reset circuit |
| CN114690876B (en) * | 2022-03-17 | 2024-04-19 | 中汽创智科技有限公司 | System state monitoring reset circuit |
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| CP01 | Change in the name or title of a patent holder | ||
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20151118 |