CN112543017A - Long-connection circuit without influence on power consumption - Google Patents
Long-connection circuit without influence on power consumption Download PDFInfo
- Publication number
- CN112543017A CN112543017A CN202011413333.9A CN202011413333A CN112543017A CN 112543017 A CN112543017 A CN 112543017A CN 202011413333 A CN202011413333 A CN 202011413333A CN 112543017 A CN112543017 A CN 112543017A
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- CN
- China
- Prior art keywords
- pin
- capacitor
- wake
- power consumption
- switch tube
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- 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.)
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- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 230000007958 sleep Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000005059 dormancy Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
- H03K17/223—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
- H03K17/284—Modifications for introducing a time delay before switching in field effect transistor switches
Abstract
The invention discloses a long-connection circuit without influencing power consumption, which comprises a capacitor C1 and a switch tube Q2, wherein a pin 1 of the switch tube Q2 is connected with one end of the capacitor C1, a pin 3 of the switch tube Q2 is connected with a wake-up end, and a pin 2 is grounded; the capacitor C1 and the pin 1 of the switch tube Q2 are grounded through a resistor R2. According to the circuit with long connection and no influence on power consumption, the switch tube Q2 and the capacitor C1 are connected in series through the wake-up pin of the MCU, the level of one end of the C1 is increased when the switch tube Q2 is switched on to wake up the MCU, the switch tube Q2 is switched off after the capacitor C1 is fully charged, the problem that the MCU of equipment cannot sleep due to long connection is solved, and power consumption is saved.
Description
Technical Field
The invention relates to the technical field of wake-up circuits during machine dormancy, in particular to a long-connection circuit without influencing power consumption.
Background
In the prior art, as shown in fig. 1, a Microprocessor (MCU) of a device has a wake-up pin, and when a pulse signal caused by a switch connection is received, the device can be woken up; the wake-up circuit generally includes a diode D37, a terminal 1 of the diode D37 is connected to the wake-up pin of the MCU, and a terminal 2 is connected to an input terminal of the switching circuit, such as an XS _ TEST terminal in the figure, for receiving the switching signal, and is grounded through a capacitor C65. However, when the XS _ TEST end cannot control the disconnection, the MCU cannot be turned off, and the MCU cannot be disconnected all the time, so that the MCU cannot be in sleep state and power consumption is wasted.
Disclosure of Invention
The invention provides a hardware delay reset circuit, aiming at solving the problem of power-off reset restart of the existing electronic equipment.
In order to achieve the above object, the present invention provides a long-connection circuit without affecting power consumption, which includes a capacitor C1 and a switch Q2, wherein a pin 1 of the switch Q2 is connected to one end of the capacitor C1, a pin 3 of the switch Q2 is connected to a wake-up terminal, and a pin 2 is grounded; the capacitor C1 and the pin 1 of the switch tube Q2 are grounded through a resistor R2.
Preferably, the other end of the capacitor C1 is grounded through a resistor R1.
Preferably, the wake-up terminal of the switching tube Q2 is connected to a wake-up pin of a microprocessor.
Preferably, the switching tube Q2 is an NMOS tube.
Preferably, when pin 1 of the switching tube Q2 is at a high level, pin 2 and pin 3 thereof are turned on; when pin 1 of the switching tube Q2 is low, pin 2 and pin 3 are disconnected.
According to the circuit with long connection and no influence on power consumption, the switch tube Q2 and the capacitor C1 are connected in series through the wake-up pin of the MCU, the level of one end of the C1 is increased when the switch tube Q2 is switched on to wake up the MCU, the switch tube Q2 is switched off after the capacitor C1 is fully charged, the problem that the MCU of equipment cannot sleep due to long connection is solved, and power consumption is saved.
Drawings
FIG. 1 is a circuit diagram of a wake-up circuit in the prior art;
fig. 2 is a circuit diagram of a long connection without affecting power consumption according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, in an embodiment of the invention, the long-connection circuit without affecting power consumption includes a capacitor C1 and a switch Q2, and the switch Q2 is an NMOS transistor; pin 1 of the switching tube Q2 is connected with the 1 end of the capacitor C1, and pin 3 of the switching tube Q2 is connected with the WAKE-UP end WAKE _ UP and pin 2 is grounded; the WAKE-UP terminal WAKE _ UP of the switching tube Q2 is connected to a WAKE-UP pin of the microprocessor. The 1 end of the capacitor C1 and the pin 1 of the switch tube Q2 are grounded through a resistor R2; the 2 end XS _ TEST of the capacitor C1 is grounded through a resistor R1; the 2 terminal XS _ TEST of the capacitor C1 is connected to the switch J1 and then connected to an input circuit, which in an embodiment includes a resistor R4 and an input voltage terminal VCC.
Specifically, the operating principle of the circuit with long connection and without affecting power consumption is as follows:
when the switch J1 of the input XS _ TEST is closed (high), the 2 terminal of C1 is pulled high instantaneously, and the voltage across the capacitor does not generate transient due to the capacitance characteristics, so a high voltage level is generated at the beginning of a period. The switch Q2 is NMOS, pin 1 is high, and then turns on, and the WAKE-UP terminal WAKE _ UP is pulled low to WAKE UP. At this time, the capacitor C1 is slowly charged, and is turned off after being fully charged, and since the resistor R2 is pulled to the ground at the 1 end of the capacitor C1, the pin 1 of the switching tube Q2 is at a low level, which causes the pin 2 and the pin 3 of the switching tube Q2 to be turned off.
The above steps complete a long connection and an IO pulse process for the wake-up terminal, and the on-time can be adjusted by adjusting the values of the capacitor C1 and the resistor R2.
After the machine is in sleep, WAKE _ UP remains unchanged as it is in the original state.
Compared with the prior art, the circuit which is long in connection and does not affect power consumption is characterized in that the switch tube Q2 and the capacitor C1 are connected in series through the awakening pin of the MCU, the level of one end of the C1 is increased when the circuit is switched on, so that the switch tube Q2 is switched on to awaken the MCU, and the switch tube Q2 is switched off when the capacitor C1 is full, so that the problem that the MCU of equipment cannot sleep due to long connection is solved, and power consumption is saved.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (5)
1. A circuit which is long in connection and does not affect power consumption is characterized by comprising a capacitor C1 and a switch tube Q2, wherein a pin 1 of the switch tube Q2 is connected with one end of the capacitor C1, a pin 3 of the switch tube Q2 is connected with a wake-up end, and a pin 2 is grounded; the capacitor C1 and the pin 1 of the switch tube Q2 are grounded through a resistor R2.
2. The circuit of claim 1, wherein the other end of the capacitor C1 is connected to ground through a resistor R1.
3. The circuit with long connection and no influence on power consumption as claimed in claim 1, wherein the wake-up terminal of the switch Q2 is connected to a wake-up pin of a microprocessor.
4. The circuit of claim 1, wherein the switch transistor Q2 is an NMOS transistor.
5. The circuit of claim 4, wherein when pin 1 of the switch Q2 is high, pin 2 and pin 3 are turned on; when pin 1 of the switching tube Q2 is low, pin 2 and pin 3 are disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011413333.9A CN112543017A (en) | 2020-12-02 | 2020-12-02 | Long-connection circuit without influence on power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011413333.9A CN112543017A (en) | 2020-12-02 | 2020-12-02 | Long-connection circuit without influence on power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112543017A true CN112543017A (en) | 2021-03-23 |
Family
ID=75016215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011413333.9A Pending CN112543017A (en) | 2020-12-02 | 2020-12-02 | Long-connection circuit without influence on power consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112543017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114895593A (en) * | 2022-05-12 | 2022-08-12 | 弘正储能(上海)能源科技有限公司 | Wake-up circuit, embedded single chip microcomputer and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050264344A1 (en) * | 2004-05-27 | 2005-12-01 | Broadcom Corporation | Precharged power-down biasing circuit |
| US20070079155A1 (en) * | 2005-10-03 | 2007-04-05 | Sunplus Technology Co., Ltd. | Power saving wake-up device for wireless mouse |
| US20080180157A1 (en) * | 2007-01-31 | 2008-07-31 | Chang-Jun Choi | Semiconductor integrated circuit device and power control method thereof |
| WO2016134158A1 (en) * | 2015-02-20 | 2016-08-25 | Gentex Corporation | Resistor multiplexed switch wake-up circuit |
| CN211606096U (en) * | 2020-04-16 | 2020-09-29 | 无锡方辰电子科技有限公司 | Low-power consumption MCU awakens circuit up |
| CN212012598U (en) * | 2020-05-26 | 2020-11-24 | 释普信息科技（上海）有限公司 | Multi-path trigger wake-up circuit of low-power consumption equipment |
-
2020
- 2020-12-02 CN CN202011413333.9A patent/CN112543017A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050264344A1 (en) * | 2004-05-27 | 2005-12-01 | Broadcom Corporation | Precharged power-down biasing circuit |
| US20070079155A1 (en) * | 2005-10-03 | 2007-04-05 | Sunplus Technology Co., Ltd. | Power saving wake-up device for wireless mouse |
| US20080180157A1 (en) * | 2007-01-31 | 2008-07-31 | Chang-Jun Choi | Semiconductor integrated circuit device and power control method thereof |
| WO2016134158A1 (en) * | 2015-02-20 | 2016-08-25 | Gentex Corporation | Resistor multiplexed switch wake-up circuit |
| CN211606096U (en) * | 2020-04-16 | 2020-09-29 | 无锡方辰电子科技有限公司 | Low-power consumption MCU awakens circuit up |
| CN212012598U (en) * | 2020-05-26 | 2020-11-24 | 释普信息科技（上海）有限公司 | Multi-path trigger wake-up circuit of low-power consumption equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114895593A (en) * | 2022-05-12 | 2022-08-12 | 弘正储能(上海)能源科技有限公司 | Wake-up circuit, embedded single chip microcomputer and control method |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 238, room 406, 1 Yichuang street, Huangpu District, Guangzhou, Guangdong 510700 Applicant after: Guangzhou langguo Electronic Technology Co.,Ltd. Address before: Room 238, room 406, 1 Yichuang street, Huangpu District, Guangzhou, Guangdong 510700 Applicant before: GUANGZHOU LANGO ELECTRONIC SCIENCE & TECHNOLOGY Co.,Ltd. |