CN113342153A - Power supply and power-on reset circuit of RF transmitting chip - Google Patents
Power supply and power-on reset circuit of RF transmitting chip Download PDFInfo
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- CN113342153A CN113342153A CN202110625475.XA CN202110625475A CN113342153A CN 113342153 A CN113342153 A CN 113342153A CN 202110625475 A CN202110625475 A CN 202110625475A CN 113342153 A CN113342153 A CN 113342153A
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- transmitting chip
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 26
- 230000009977 dual effect Effects 0.000 claims description 13
- 238000004146 energy storage Methods 0.000 claims description 10
- 239000003086 colorant Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/24—Resetting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention provides a power supply and power-on reset circuit of an RF transmitting chip, which is characterized by comprising a main circuit power supply interface, wherein the main circuit power supply interface supplies power to the RF transmitting chip through a first voltage conversion chip; after the main power supply fails, the standby power supply unit supplies power to the RF transmitting chip through the voltage conversion chip II; the I/O port of the RF transmitting chip is connected with the voltage sampling interface, and the reset port is connected with the reset circuit unit. In the technical scheme disclosed by the invention, when the main circuit power supply fails, the standby power supply unit continues to supply power to the RF transmitting chip. And when the main circuit power supply is recovered, the RF transmitting chip is reset again by using the reset circuit unit, so that the RF transmitting chip can stably work for a long time. Furthermore, in the technical scheme disclosed by the invention, whether the main circuit power supply fails or not is monitored by utilizing the RF transmitting chip, an additional warning circuit is not required to be added, and the hardware cost of the circuit is saved.
Description
Technical Field
The invention relates to a power supply and power-on reset circuit for an RF transmitting chip.
Background
In most of the conventional power supply circuits, the auxiliary power supply is realized by using elements such as a capacitor and the like only under the condition that a main power supply loop fails. For example: the utility model discloses a chinese utility model patent with publication number CN211166739U, publication date of 2020, 8 months and 4 days, which discloses a power supply circuit and a power supply device using the same, wherein the power supply circuit comprises a main power supply and an auxiliary power supply which are respectively connected with a load, and the auxiliary power supply comprises a control unit, a current acquisition unit, a super capacitor unit, a first power supply unit and a second power supply unit; the super capacitor unit, the first power supply unit and the second power supply unit are respectively connected with the control unit; the current acquisition unit is respectively connected with the control unit and the load; the super capacitor unit, the first power supply unit and the second power supply unit are respectively connected with the main power supply.
In the power supply circuit, the auxiliary power supply maintains power supply if the main power supply fails. However, for a circuit chip such as an RF transmitting chip, it is necessary to ensure that it can be powered continuously, and when the main power is restored, the RF transmitting chip needs to be restarted to ensure that it can work normally for a long time. Most of the existing power supply circuits do not have the above functions. In addition, when the conventional power supply circuit realizes the failure alarm of the main power supply, an additional alarm circuit or a chip is required to be adopted for realizing the failure alarm, so that the circuit cost is increased.
Disclosure of Invention
The invention aims to provide a circuit which can ensure that power can be supplied to an RF transmitting chip after a main power supply loop fails and the RF transmitting chip can be restarted after the main power supply loop returns to normal.
In order to achieve the above object, the power supply and power-on reset circuit of an RF transmitting chip of the present invention is characterized in that the power supply and power-on reset circuit includes a main circuit power supply interface, the main circuit power supply interface is respectively connected to a delay unit, an anode of a diode D91, a gate of a MOS transistor Q18, a drain of a dual PMOS transistor Q17, and an input terminal of a first voltage conversion chip;
the cathode of the diode D91 is connected with two gates of a double PMOS tube Q15; two source electrodes of the double PMOS tube Q15 are short-circuited; one drain electrode of the double PMOS tube Q15 is connected with the power supply interface of the RF transmitting chip, and the other drain electrode of the double PMOS tube Q15 is connected with the output end of the second voltage conversion chip; the input end of the second voltage conversion chip is connected with the standby power supply unit, and the standby power supply circuit is connected with one end of the resistor R251; the other end of the resistor R251 is respectively connected with the drain electrode of the MOS transistor Q18, the two grid electrodes of the double PMOS transistor Q17 and the two grid electrodes of the double PMOS transistor Q3;
the source electrode of the MOS transistor Q18 is grounded, and a resistor R252 is connected between the source electrode and the grid electrode of the MOS transistor Q18 in a bridging manner;
two sources of the double PMOS tube Q17 are in short circuit, the other drain of the double PMOS tube Q17 is connected with the anode of the diode D92, and the cathode of the diode D92 is connected with the standby power supply unit;
the output end of the first voltage conversion chip is respectively connected with the voltage sampling interface and one drain electrode of a double PMOS tube Q3, two source electrodes of the double PMOS tube Q3 are in short circuit, and the drain electrode of the other end of the double PMOS tube Q3 is connected with the power supply interface of the RF emission chip;
the power supply interface of the RF transmitting chip is connected with the power input end of the RF transmitting chip;
one I/O port of the RF transmitting chip is connected with the voltage sampling interface;
the reset port of the RF transmitting chip is connected with the reset circuit unit.
Preferably, the delay unit includes a resistor R254 and a capacitor C310 connected in series, the resistor R254 is connected to the main circuit power supply interface, and one end of the capacitor C310 is connected to the resistor R254 and the two gates of the dual PMOS transistor Q15.
Preferably, the standby power supply unit adopts a resistance-capacitance circuit.
Preferably, the resistance-capacitance circuit consists of a resistor R247 and an energy storage capacitor CN19, one end of the resistor R247 is connected to the cathode of the diode D92, and the other end is connected to the energy storage capacitor CN 19; the energy storage capacitor CN19 is further connected to the input terminal of the second voltage conversion chip and one end of the resistor R251.
Preferably, the power supply device further comprises a status indication circuit unit, and the status indication circuit unit is connected with the power supply interface of the RF transmitting chip.
Preferably, the status indication circuit unit includes two status indication circuits, each of the two status indication circuits includes two light emitting diodes emitting light of different colors, anodes of the two light emitting diodes are respectively connected to the power supply interface of the RF emission chip, and cathodes of the two light emitting diodes are respectively connected to different I/O ports of the RF emission chip.
Preferably, the reset circuit unit includes a MOS transistor Q19, the drain of the MOS transistor Q19 is connected to the reset port of the RF transmitter chip, the source is grounded, the gate is connected to one end of a resistor R256 and the drain of the MOS transistor Q20, respectively, the other end of the resistor R256 is connected to the main circuit power supply interface, the main circuit power supply interface is further connected to the cathode of a diode D93 and one end of a resistor R255, the anode of the diode D93 and the other end of the resistor R255 are connected to the gate of a MOS transistor Q20, the source of the MOS transistor Q20 is grounded, and a capacitor C311 is connected across between the gate and the source of the MOS transistor Q20.
In the technical scheme disclosed by the invention, when the main circuit power supply fails, the standby power supply unit continues to supply power to the RF transmitting chip. And when the main circuit power supply is recovered, the RF transmitting chip is reset again by using the reset circuit unit, so that the RF transmitting chip can stably work for a long time. Furthermore, in the technical scheme disclosed by the invention, whether the main circuit power supply fails or not is monitored by utilizing the RF transmitting chip, an additional warning circuit is not required to be added, and the hardware cost of the circuit is saved.
Drawings
FIG. 1 is a schematic circuit diagram of a main power supply circuit and a standby energy storage power supply circuit in a power supply circuit according to an embodiment;
fig. 2 is a schematic circuit diagram of a main power supply detection and power-on reset circuit in a power supply circuit according to an embodiment.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Fig. 1 and 2 show a power supply and a power-on reset circuit of an RF transmitting chip according to the present invention, in which: VDD _5V represents a main circuit power supply interface; VDD _ RF represents the RF transmitting chip power supply interface; q17, Q3 and Q15 are all double PMOS tubes; u18 and U56 are voltage conversion chips for converting 5V voltage into 3.3V voltage; CN19 is an energy storage capacitor; u49 is an RF transmitting chip, which receives/transmits wireless data under the control of MCU.
When the main circuit power supply works normally, 5V voltage is provided through the main circuit power supply interface VDD _ 5V. The voltage conversion chip U18 works normally, converts the 5V voltage into +3.3V voltage and outputs the voltage to the double PMOS tube Q3. Meanwhile, the +3.3V voltage output from the voltage conversion chip U18 is directly input to one I/O of the RF transmitter chip U49, so that the RF transmitter chip U49 can detect whether the voltage conversion chip U18 operates normally.
Because the grid of the MOS tube Q18 is connected with the main circuit power supply interface VDD _5V, when the main circuit power supply works normally, the MOS tube Q18 is in a conducting state, the drain electrode and the source electrode of the MOS tube Q18 are conducted, and the state is a grounding state, so that the grids of the double PMOS tube Q17 and the double PMOS tube Q3 of the subsequent circuit are pulled to be low level, and the double PMOS tube Q17 and the double PMOS tube Q3 are both in a conducting state.
The conduction of the double PMOS tube Q17 allows the 5V voltage supplied by the main circuit power supply to charge a resistance-capacitance circuit composed of a resistor R247 and an energy storage capacitor CN19 through a diode D92, and the energy storage capacitor CN19 serves as a standby power supply. Since the 5V voltage supplied by the main circuit power supply is supplied to the dual PMOS transistor Q15 through the diode D91, the gate of the dual PMOS transistor Q15 is pulled high, and the dual PMOS transistor Q15 is in an off state, so that the rc circuit is ensured to be in a charging state and cannot provide an output. Since the dual PMOS transistor Q3 is in a conducting state, the +3.3V voltage output by the voltage conversion chip U18 supplies power to the RF transmitting chip power interface VDD _ RF via the dual PMOS transistor Q3.
When the RF transmitting chip power supply interface VDD _ RF is energized, the light emitting diode D80 is lit to emit red light, and at the same time, the light emitting diode D81 is lit to emit green light.
When the main circuit power supply has a problem, the 5V voltage on the main circuit power supply interface VDD _5V disappears, and the main circuit power supply interface is in a low level state. At this time, the MOS transistor Q18 is turned off, and the storage capacitor CN19 starts to supply power. The gates of the dual PMOS transistor Q17 and the dual PMOS transistor Q3 are pulled high by the resistor R251, so that the dual PMOS transistor Q17 and the dual PMOS transistor Q3 are both in an off state. Meanwhile, the capacitor C310 and the resistor R254 form a small time delay circuit, and after the capacitor C310 discharges for a period of time, the grid electrode of the double PMOS tube Q15 is pulled down to conduct the double PMOS tube Q15. At this time, the energy storage capacitor CN19 can use the voltage conversion chip U56 and the dual PMOS transistor Q15 to provide +3.3V for the RF transmitting chip power interface VDD _ RF.
The RF transmitting chip U49 detects that the 3.3V voltage signal output by the voltage conversion chip disappears through the I/O port of the RF transmitting chip U49, and after the power-on is completed through the energy storage capacitor CN19, the RF transmitting chip U49 transmits a wireless signal to report the power-off fault of the power supply, and the whole process of power-off reporting is completed.
When the main power supply is powered on again, the main power supply interface VDD _5V provides 5V voltage again, the grid electrode of the double PMOS transistor Q15 is pulled high again, the double PMOS transistor Q15 is in an off state, and the double PMOS transistor Q3 and the double PMOS transistor Q17 are turned on again. At this time, the RF transmitting chip power interface is provided by the voltage conversion chip U18 which operates normally. Meanwhile, as the main power supply interface VDD _5V is powered up again, the MOS transistor Q19 is turned on because the gate thereof is in the pull-up high level state, and the reset port of the RF transmitting chip U49 is set low, thereby performing a restart state. With the charging of the capacitor C311 completed, the MOS transistor Q20 is turned on, so that the gate of the MOS transistor Q19 is pulled low again, and the MOS transistor Q19 is turned off. At this point, the RF transmitting chip U49 is restarted and enters the normal operating mode.
Claims (7)
1. A power supply and power-on reset circuit of an RF transmitting chip is characterized by comprising a main circuit power supply interface (VDD _5V), wherein the main circuit power supply interface (VDD _5V) is respectively connected with a delay unit, an anode of a diode D91, a grid electrode of a MOS tube Q18, a drain electrode of a double PMOS tube Q17 and an input end of a voltage conversion chip I (U18);
the cathode of the diode D91 is connected with two gates of a double PMOS tube Q15; two source electrodes of the double PMOS tube Q15 are short-circuited; one drain of the double PMOS tube Q15 is connected with the power supply interface (VDD _ RF) of the RF transmitting chip, and the other drain of the double PMOS tube Q15 is connected with the output end of the second voltage conversion chip (U56); the input end of the second voltage conversion chip (U56) is connected with the standby power supply unit, and the standby power supply circuit is connected with one end of the resistor R251; the other end of the resistor R251 is respectively connected with the drain electrode of the MOS transistor Q18, the two grid electrodes of the double PMOS transistor Q17 and the two grid electrodes of the double PMOS transistor Q3;
the source electrode of the MOS transistor Q18 is grounded, and a resistor R252 is connected between the source electrode and the grid electrode of the MOS transistor Q18 in a bridging manner;
two sources of the double PMOS tube Q17 are in short circuit, the other drain of the double PMOS tube Q17 is connected with the anode of the diode D92, and the cathode of the diode D92 is connected with the standby power supply unit;
the output end of the first voltage conversion chip (U18) is respectively connected with the voltage sampling interface and one drain electrode of the double PMOS tube Q3, two source electrodes of the double PMOS tube Q3 are in short circuit, and the drain electrode at the other end of the double PMOS tube Q3 is connected with the power supply interface (VDD _ RF) of the RF emission chip;
the power supply interface (VDD _ RF) of the RF transmitting chip is connected with the power supply input end of the RF transmitting chip;
one I/O port of the RF transmitting chip is connected with the voltage sampling interface;
the reset port of the RF transmitting chip is connected with the reset circuit unit.
2. The power supply and power-on-reset circuit of claim 1, wherein the delay unit comprises a resistor R254 and a capacitor C310 connected in series, the resistor R254 is connected to the main power supply interface (VDD _5V), and one end of the capacitor C310 is connected to both the resistor R254 and the two gates of the dual PMOS transistor Q15.
3. The power supply and power-on-reset circuit of an RF transmit chip as claimed in claim 1, wherein said standby power supply unit employs a resistor-capacitor circuit.
4. The power supply and power-on-reset circuit of an RF transmitting chip as claimed in claim 3, wherein the rc circuit is composed of a resistor R247 and a storage capacitor CN19, one end of the resistor R247 is connected to the cathode of the diode D92, and the other end is connected to the storage capacitor CN 19; the energy storage capacitor CN19 is further connected to the input terminal of the second voltage conversion chip (U56) and one end of the resistor R251.
5. The power supply and power-on-reset circuit of an RF transmitting chip as claimed in claim 1, further comprising a status indication circuit unit, the status indication circuit unit being connected to the power supply interface (VDD _ RF) of the RF transmitting chip.
6. The power supply and power-on reset circuit of claim 5, wherein the status indication circuit unit comprises two status indication circuits, each status indication circuit comprises two light emitting diodes emitting light of different colors, anodes of the two light emitting diodes are respectively connected to the power supply interface (VDD _ RF) of the RF transmitter chip, and cathodes of the two light emitting diodes are respectively connected to different I/O ports of the RF transmitter chip.
7. The power supply and power-on reset circuit of claim 1, wherein the reset circuit unit comprises a MOS transistor Q19, the drain of the MOS transistor Q19 is connected to the reset port of the RF transmitter chip, the source is grounded, the gate is connected to one end of a resistor R256 and the drain of the MOS transistor Q20, respectively, the other end of the resistor R256 is connected to the main power supply interface (VDD _5V), the main power supply interface (VDD _5V) is further connected to the cathode of a diode D93 and one end of a resistor R255, the anode of the diode D93 and the other end of the resistor R255 are connected to the gate of a MOS transistor Q20, the source of the MOS transistor Q20 is grounded, and a capacitor C311 is connected between the gate and the source of the MOS transistor Q20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625475.XA CN113342153A (en) | 2021-06-04 | 2021-06-04 | Power supply and power-on reset circuit of RF transmitting chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625475.XA CN113342153A (en) | 2021-06-04 | 2021-06-04 | Power supply and power-on reset circuit of RF transmitting chip |
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| Publication Number | Publication Date |
|---|---|
| CN113342153A true CN113342153A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110625475.XA Pending CN113342153A (en) | 2021-06-04 | 2021-06-04 | Power supply and power-on reset circuit of RF transmitting chip |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699200A (en) * | 2013-12-31 | 2014-04-02 | 青岛歌尔声学科技有限公司 | Power-off control circuit and electronic product |
| CN103716023A (en) * | 2013-12-03 | 2014-04-09 | 北京中电华大电子设计有限责任公司 | Power-on reset circuit with ultra-low power consumption |
| CN106054087A (en) * | 2016-07-15 | 2016-10-26 | 上海璜域光电科技有限公司 | Power supply detection circuit used for passive radio frequency tag |
| WO2017076302A1 (en) * | 2015-11-03 | 2017-05-11 | 上海易码信息科技有限公司 | Mobile payment device |
| EP3493654A1 (en) * | 2017-12-01 | 2019-06-05 | Self Electronics Co., Ltd. | Dali interface circuit with bootstrap function |
| CN216014202U (en) * | 2021-06-04 | 2022-03-11 | 上海助院科技有限公司 | Power supply and power-on reset circuit of RF transmitting chip |
-
2021
- 2021-06-04 CN CN202110625475.XA patent/CN113342153A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103716023A (en) * | 2013-12-03 | 2014-04-09 | 北京中电华大电子设计有限责任公司 | Power-on reset circuit with ultra-low power consumption |
| CN103699200A (en) * | 2013-12-31 | 2014-04-02 | 青岛歌尔声学科技有限公司 | Power-off control circuit and electronic product |
| WO2017076302A1 (en) * | 2015-11-03 | 2017-05-11 | 上海易码信息科技有限公司 | Mobile payment device |
| CN106054087A (en) * | 2016-07-15 | 2016-10-26 | 上海璜域光电科技有限公司 | Power supply detection circuit used for passive radio frequency tag |
| EP3493654A1 (en) * | 2017-12-01 | 2019-06-05 | Self Electronics Co., Ltd. | Dali interface circuit with bootstrap function |
| CN216014202U (en) * | 2021-06-04 | 2022-03-11 | 上海助院科技有限公司 | Power supply and power-on reset circuit of RF transmitting chip |
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