CN206657191U - Inexpensive real time clock circuit - Google Patents
Inexpensive real time clock circuit Download PDFInfo
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- CN206657191U CN206657191U CN201720358089.8U CN201720358089U CN206657191U CN 206657191 U CN206657191 U CN 206657191U CN 201720358089 U CN201720358089 U CN 201720358089U CN 206657191 U CN206657191 U CN 206657191U
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- circuit
- rtc
- power supply
- real time
- time clock
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Abstract
The utility model provides a kind of inexpensive real time clock circuit, solves the problems such as prior art cost of manufacture is high, it includes battery power, distinguish batteries in parallel connection measuring circuit and RTC power supply circuits in battery power both ends, and powered by battery power for cell measurement circuit, RTC power supply circuits are connected to RTC circuit and powered for RTC circuit, cell measurement circuit and real time clock circuit are connected to MCU module by telecommunication circuit, the utility model does not need independent power supply and telecommunication circuit, can greatly save cost of manufacture.
Description
Technical field
A kind of real time clock circuit, more particularly to a kind of inexpensive real time clock circuit are the utility model is related to, belongs to circuit neck
Domain.
Background technology
The abbreviation of real-time clock (RTC) is RTC (Real_Time Clock).RTC is integrated circuit, commonly referred to as clock chip.RTC
Circuit is one of consumer electronics product being most widely used in daily life.It provides accurate real-time time for people,
Or accurate time reference is provided for electronic system, RTC circuit is mostly using the higher crystal oscillator conduct of precision at present
Clock source.But the real time clock circuit of prior art generally requires independent supplying cell, such as button cell, and it is independent logical
Circuit is believed to be communicated with MCU, and replacing battery is needed when button cell exhausts, and the independent electrical of clock circuit
Generally there is the problem of changing battery difficulty in source, and cost height be present using single supplying cell and independent telecommunication circuit
The shortcomings of, it is unfavorable for producing in enormous quantities.
In order to solve the above-mentioned technical problem, people have carried out long-term exploration, such as Chinese patent discloses one kind in real time
Clock power supply circuit [application number：CN201521015047.1], including：Internal battery, external power supply, power supply switch circuit and in real time
Clock chip；The first input end of the power supply switch circuit connects the positive pole of the internal battery, and the second input termination is described outer
The positive pole of power supply is connect, output terminates the power input of the real-time timepiece chip；The internal battery and the external power supply
Negative pole ground connection；The power supply switch circuit is used for, and when the external power supply is connected, it is the reality to switch the external power supply
Shi Shizhong chip power supplies；When the external power supply disconnects, switch the internal battery and powered for the real-time timepiece chip.
Although such scheme solves the problems, such as battery altering difficulty, but do not solve the problems, such as that circuit cost is high,
Also need to further perfect.
Utility model content
The purpose of this utility model is in view of the above-mentioned problems, cost real time clock circuit can be reduced by providing one kind.
To reach above-mentioned purpose, the utility model employs following technical proposal：Inexpensive real-time clock (RTC) of the present utility model
Circuit includes battery power, described battery power both ends difference batteries in parallel connection measuring circuit and RTC power supply circuits, and by
Battery power is powered for cell measurement circuit, and described RTC power supply circuits are connected to RTC circuit and powered for RTC circuit.
Pass through above-mentioned technical proposal, by a battery power be cell measurement circuit power, by with battery power
Power supply circuit in parallel is powered for RTC circuit, it is not necessary to independent RTC circuit supplying cell, reaches cost-effective purpose.
In above-mentioned inexpensive real time clock circuit, described RTC power supply circuits include a divider resistance with using electricity
Partial pressure mode is hindered to power for RTC circuit.
In above-mentioned inexpensive real time clock circuit, described RTC power supply circuits include a low pressure difference linear voltage regulator
Powered in a manner of using voltage stabilizing for RTC circuit.
In above-mentioned inexpensive real time clock circuit, described RTC power supply circuits include a diode to utilize two poles
The pressure drop of pipe is powered for clock chip.
In above-mentioned inexpensive real time clock circuit, described cell measurement circuit and real time clock circuit pass through the electricity that communicates
Road is connected to MCU module.
Pass through above-mentioned technical proposal, it is only necessary to which a telecommunication circuit, RTC circuit do not need independent telecommunication circuit, enter one
Step reaches cost-effective purpose.
Compared with prior art, the utility model has the advantage of：It is achieved at low cost the power supply electricity of RTC circuit needs
Source and telecommunication circuit, it is not necessary to independent power supply and telecommunication circuit, save cost of manufacture.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram provided by the utility model.
In figure, battery power 1；Cell measurement circuit 2；RTC power supply circuits 3；RTC circuit 4；Telecommunication circuit 5；MCU moulds
Block 6.
Embodiment
As shown in figure 1, inexpensive real time clock circuit of the present utility model includes battery power 1, the both ends of battery power 1
Batteries in parallel connection measuring circuit 2 and RTC power supply circuits respectively, and be that cell measurement circuit 2 is powered by battery power 1, RTC power supplies
Circuit 3 is connected to RTC circuit 4 and powered for RTC circuit 4, wherein, RTC power supply circuits 3 include a divider resistance with using resistance
Partial pressure mode is that RTC circuit 4 is powered；Or RTC power supply circuits 3 include diode using the pressure drop using diode as when
Clock chip power supply；Or RTC power supply circuits 3 include a low pressure difference linear voltage regulator in a manner of using voltage stabilizing for RTC circuit 4
Power supply；And low pressure difference linear voltage regulator have the advantage such as conducting, uninterruption power source all the time can be provided, so the present embodiment
Preferentially RTC circuit 4 is powered using low pressure difference linear voltage regulator.The battery power 1 of the present embodiment is to battery measurement
Circuit 2 is powered while power supply by RTC power supply circuits 3 to RTC circuit 4, eliminates an independent RTC supplying cell, is dropped
Low cost of manufacture.
Further, because cell measurement circuit 2 itself is needed and MCU is communicated, so in whole circuit
A telecommunication circuit 5 be present, and RTC circuit 4 is also required to be communicated with MCU, so the cell measurement circuit 2 of the present embodiment
MCU module 6 is connected to by same telecommunication circuit 5 with real time clock circuit, makes RTC circuit 4 by already present communication electricity itself
Road 5 is communicated with MCU module 6, it is not necessary to independent telecommunication circuit 5, reduce further cost.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Although battery power 1 has more been used herein；Cell measurement circuit 2；RTC power supply circuits 3；RTC circuit 4；
Telecommunication circuit 5；The grade term of MCU module 6, but it is not precluded from the possibility using other terms.The use of these terms is only to be
More easily describe and explain essence of the present utility model；Being construed as any additional limitation is all and this reality
Disagreed with new spirit.
Claims (5)
1. a kind of inexpensive real time clock circuit, including battery power (1), it is characterised in that：Described battery power (1) two
End batteries in parallel connection measuring circuit (2) and RTC power supply circuits (3), and be cell measurement circuit (2) by battery power (1) respectively
Power supply, described RTC power supply circuits (3) are connected to RTC circuit (4) and powered for RTC circuit (4).
2. inexpensive real time clock circuit according to claim 1, it is characterised in that described RTC power supply circuits (3) include
One divider resistance is powered in a manner of using electric resistance partial pressure for RTC circuit (4).
3. inexpensive real time clock circuit according to claim 1, it is characterised in that described RTC power supply circuits (3) include
One low pressure difference linear voltage regulator is powered in a manner of using voltage stabilizing for RTC circuit (4).
4. inexpensive real time clock circuit according to claim 1, it is characterised in that described RTC power supply circuits (3) include
One diode is powered by clock chip of the pressure drop using diode.
5. inexpensive real time clock circuit according to claim 1, it is characterised in that described cell measurement circuit (2) and
Real time clock circuit is connected to MCU module (6) by telecommunication circuit (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720358089.8U CN206657191U (en) | 2017-04-07 | 2017-04-07 | Inexpensive real time clock circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720358089.8U CN206657191U (en) | 2017-04-07 | 2017-04-07 | Inexpensive real time clock circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206657191U true CN206657191U (en) | 2017-11-21 |
Family
ID=60317278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720358089.8U Active CN206657191U (en) | 2017-04-07 | 2017-04-07 | Inexpensive real time clock circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206657191U (en) |
-
2017
- 2017-04-07 CN CN201720358089.8U patent/CN206657191U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |