CN106026998A - Hysteresis comparison circuit with backup function - Google Patents
Hysteresis comparison circuit with backup function Download PDFInfo
- Publication number
- CN106026998A CN106026998A CN201610296416.1A CN201610296416A CN106026998A CN 106026998 A CN106026998 A CN 106026998A CN 201610296416 A CN201610296416 A CN 201610296416A CN 106026998 A CN106026998 A CN 106026998A
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- CN
- China
- Prior art keywords
- comparator
- analog switch
- input
- outfan
- door
- Prior art date
- 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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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
- H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
- H03K3/0233—Bistable circuits
- H03K3/02337—Bistables with hysteresis, e.g. Schmitt trigger
Abstract
The invention relates to a window comparator circuit with a backup function. Comparators N1A, N1B and a resistor R1 are connected into a window comparator 1, comparators N2A, N2B and a resistor R2 are connected to a window comparator 2, and an analog switch N5, a comparator N6A and a resistor R3 constitute a hysteresis comparator; and the circuit has two paths of input signals, when one path of input signals is faulty, the other path of signals is automatically adopted to serve as the input signals of the hysteresis comparator, and a reference voltage of the hysteresis comparator can be accurately set.
Description
Technical field
The invention belongs to design of electronic circuits technology, relate to window comparator, hysteresis loop comparator application
Technology.
Background technology
Tail-rotor leaf heating at present is anti-icing is to use fixing control law, does not accounts for the temperature of tail-rotor leaf
Degree, power consumption efficiency is low, and blade is also possible to because temperature is too high impaired.In order to accurately control to go straight up to
Tail blade is electrically heated anti-icing, is embedded with two temperature sensors, Qi Zhongyi inside blade
Individual temperature sensor is as backup.Tail-rotor leaf is disconnected when temperature sensor temperature is less than uniform temperature
Heating, starts the heating of tail-rotor leaf, a temperature when temperature sensor temperature is higher than uniform temperature
Use backup temperature sensor as tail-rotor leaf temp basis for estimation after sensor fault.
Summary of the invention
It is an object of the invention to: propose a kind of hysteresis loop comparator circuit having backup functionality, this circuit
There is two-way input signal, when wherein a road input signal breaks down, automatically use another road to believe
Number as the input signal of hysteresis loop comparator, and the reference voltage of hysteresis loop comparator can accurately set
Fixed.
The technical scheme is that a kind of hysteresis loop comparator circuit with backup functionality, including
Comparator N1A, N1B, N2A, N2B, N6A, resistance R1, R2, R3, or door N3A, NAND gate
N4A, analog switch N5；Comparator N1A, N1B and resistance R1 connect into window comparator 1,
Comparator N2A, N2B and resistance R2 connect into window comparator 2, analog switch N5, comparator
N6A, resistance R3 form hysteresis loop comparator；VWith reference to 1HAnd VWith reference to 1LIt is window comparator 1 and window ratio
The relatively reference voltage of device 2, VWith reference to 1HWith the in-phase end N1A-3 and comparator N2A of comparator N1A
In-phase end N2A-3 is connected, VWith reference to 1LWith the end of oppisite phase N1B-6 and comparator N2B of comparator N1B
End of oppisite phase N2B-6 is connected；Input signal 1 and the end of oppisite phase N1A-2 of comparator N1A, comparator
The in-phase end N1B-5 of N1B and the input N5-13 of analog switch be connected, input signal 2 with than
End of oppisite phase N2A-2, the in-phase end N2B-5 of comparator N2B and analog switch compared with device N2A defeated
Enter to hold N5-12 to be connected；The power end N1A-8 of comparator N1A, the power end N2A-8 of comparator N2A,
The power end N3A-8 of comparator N3A, the power positive end N5-16 and power supply VCC of analog switch N5
It is connected, the earth terminal N1A-4 of comparator N1A, the earth terminal N2A-4 of comparator N2A, comparator
The earth terminal N6A-4 of N6A and Enable Pin N5-6 of analog switch N5, power supply negative terminal N5-7, connect
Ground end N5-8 is connected with ground end GND；Power supply VCC is by the output of resistance R2 and comparator N2A
The input N3A-1 holding the outfan N2B-7 or door N3A of N2A-1, comparator N2B is connected,
Power supply VCC is by resistance R1 and the outfan N1A-1 of comparator N1A, the output of comparator N1B
The input N3A-2 of end N1B-7 or door N3A is connected with the control end N5-11 of analog switch；Defeated
Enter signal VWith reference to 2HAnd VWith reference to 2LConnect input N5-5, N5-3 of analog switch, analog switch respectively
Outfan N5-14 connect comparator N6A end of oppisite phase N6A-2, the outfan N5-4 of analog switch
Connect in-phase end N6A-3, the power supply VCC output by R3 and comparator N6A of comparator N6A
Hold N6A-1, the control end N5-9 of analog switch N5 and be connected with the input N4A-2 of door N4A,
Or the outfan N3A-3 of door N3A and being connected with the input N4A-1 of door N4A, signal from door
The outfan N4A-3 output of N4A.
The invention have the advantage that the reference voltage that can accurately set hysteresis loop comparator, when wherein one
When road input signal breaks down, automatically use another road signal as the input letter of hysteresis loop comparator
Number.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is described in further detail.One has backup merit
Can hysteresis loop comparator circuit, including comparator N1A, N1B, N2A, N2B, N6A, resistance R1,
R2, R3, or door N3A, NAND gate N4A, analog switch N5；Comparator N1A, N1B and resistance
R1 connects into window comparator 1, and comparator N2A, N2B and resistance R2 connect into window comparator
2, analog switch N5, comparator N6A, resistance R3 form hysteresis loop comparator；As shown in Figure 1.
(1)VWith reference to 1HAnd VWith reference to 1LIt is window comparator 1 and the reference voltage of window comparator 2,
VWith reference to 1HIt is connected with the in-phase end N2A-3 of the in-phase end N1A-3 and comparator N2A of comparator N1A,
VWith reference to 1LIt is connected with the end of oppisite phase N2B-6 of the end of oppisite phase N1B-6 and comparator N2B of comparator N1B；
(2) input signal 1 and the end of oppisite phase N1A-2 of comparator N1A, the homophase of comparator N1B
The input N5-13 of end N1B-5 and analog switch is connected；
(3) input signal 2 and the end of oppisite phase N2A-2 of comparator N2A, the homophase of comparator N2B
The input N5-12 of end N2B-5 and analog switch is connected；
(4) the power end N1A-8 of comparator N1A, the power end N2A-8 of comparator N2A, ratio
The power end N3A-8 of relatively device N3A, power positive end N5-16 and the power supply VCC phase of analog switch N5
Even；
(5) the earth terminal N1A-4 of comparator N1A, the earth terminal N2A-4 of comparator N2A, ratio
The earth terminal N6A-4 of relatively device N6A and Enable Pin N5-6 of analog switch N5, power supply negative terminal N5-7,
Earth terminal N5-8 is connected with ground end GND；
(6) power supply VCC is by resistance R2 and the outfan N2A-1 of comparator N2A, comparator
The input N3A-1 of the outfan N2B-7 or door N3A of N2B is connected；
(7) power supply VCC is by resistance R1 and the outfan N1A-1 of comparator N1A, comparator
The input N3A-2 of the outfan N1B-7 or door N3A of N1B and the control end N5-11 of analog switch
It is connected；
(8) input signal VWith reference to 2HAnd VWith reference to 2LConnect respectively analog switch input N5-5,
N5-3；
(9) the outfan N5-14 of analog switch connects the end of oppisite phase N6A-2 of comparator N6A, mould
The outfan N5-4 intending switch connects the in-phase end N6A-3 of comparator N6A；
(10) power supply VCC is by R3 and the outfan N6A-1 of comparator N6A, analog switch N5
Control end N5-9 and be connected with the input N4A-2 of door N4A；
Or the outfan N3A-3 of door N3A and being connected with the input N4A-1 of door N4A (11)；
(12) signal exports from the outfan N4A-3 with door N4A.
This enforcement sets reference voltage VWith reference to 1L<VWith reference to 2L<VWith reference to 2H<VWith reference to 1H, work as VWith reference to 1L< input letter
Number 1 < VWith reference to 1HTime, input signal 1 is connected to the end of oppisite phase of comparator N6A, with comparator N6A
In-phase end compare, by the output end signal of comparator N6A is fed back to analog switch N5
Control end N5-9, input signal 1 control with the comparative result with the in-phase end of comparator N6A
It is V that comparator N6A in-phase end is connected to reference voltageWith reference to 2LOr VWith reference to 2H, thus realize hysteresis ratio
Accurately setting and switching of the reference voltage of relatively device.As input signal 1 < VWith reference to 1LOr input signal 1 is big
In VWith reference to 1HTime, the output of window comparator 1 control analog switch N5 switching input voltage 2 with than
The end of oppisite phase N6-2 of relatively device N6A connects, input signal 2 take over input signal 1 as hysteresis ratio
The input signal of relatively device, it is achieved the input signal 2 backup to input signal 1.
Claims (1)
1. a window comparator circuit with backup functionality, it is characterised in that: include comparator
N1A, N1B, N2A, N2B, N6A, resistance R1, R2, R3, or door N3A, NAND gate N4A,
Analog switch N5；Comparator N1A, N1B and resistance R1 connect into window comparator 1, comparator
N2A, N2B and resistance R2 connect into window comparator 2, analog switch N5, comparator N6A,
Resistance R3 forms hysteresis loop comparator；VWith reference to 1HAnd VWith reference to 1LIt is window comparator 1 and window comparator 2
Reference voltage, VWith reference to 1HIn-phase end N1A-3 and the in-phase end of comparator N2A with comparator N1A
N2A-3 is connected, VWith reference to 1LEnd of oppisite phase N1B-6 and the end of oppisite phase of comparator N2B with comparator N1B
N2B-6 is connected；Input signal 1 and the end of oppisite phase N1A-2 of comparator N1A, comparator N1B same
The input N5-13 of end N1B-5 and analog switch is connected mutually, input signal 2 and comparator N2A
End of oppisite phase N2A-2, the in-phase end N2B-5 of comparator N2B and the input N5-12 of analog switch
It is connected；The power end N1A-8 of comparator N1A, the power end N2A-8 of comparator N2A, comparator
The power end N3A-8 of N3A, the power positive end N5-16 of analog switch N5 are connected with power supply VCC,
The earth terminal N1A-4 of comparator N1A, the earth terminal N2A-4 of comparator N2A, comparator N6A
Earth terminal N6A-4 and Enable Pin N5-6 of analog switch N5, power supply negative terminal N5-7, earth terminal
N5-8 is connected with ground end GND；Power supply VCC by the outfan N2A-1 of resistance R2 and comparator N2A,
The input N3A-1 of the outfan N2B-7 or door N3A of comparator N2B is connected, and power supply VCC leads to
Cross resistance R1 and the outfan N1A-1 of comparator N1A, the outfan N1B-7 of comparator N1B,
Or the input N3A-2 of door N3A is connected with the control end N5-11 of analog switch；Input signal VGinseng Examine 2HAnd VWith reference to 2LConnect input N5-5, N5-3 of analog switch, the outfan of analog switch respectively
N5-14 connects the end of oppisite phase N6A-2 of comparator N6A, and the outfan N5-4 of analog switch connects ratio
The in-phase end N6A-3 of relatively device N6A, power supply VCC by the outfan N6A-1 of R3 and comparator N6A,
The control end N5-9 of analog switch N5 and being connected with the input N4A-2 of door N4A, or door N3A
Outfan N3A-3 and be connected with the input N4A-1 of door N4A, defeated from door N4A of signal
Go out and hold N4A-3 to export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610296416.1A CN106026998B (en) | 2016-05-06 | 2016-05-06 | A kind of hysteresis comparison circuit with backup functionality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610296416.1A CN106026998B (en) | 2016-05-06 | 2016-05-06 | A kind of hysteresis comparison circuit with backup functionality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106026998A true CN106026998A (en) | 2016-10-12 |
| CN106026998B CN106026998B (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610296416.1A Active CN106026998B (en) | 2016-05-06 | 2016-05-06 | A kind of hysteresis comparison circuit with backup functionality |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060082392A1 (en) * | 2004-10-15 | 2006-04-20 | Gye-Soo Koo | Comparator with hysteresis and method of comparing using the same |
| CN101030771A (en) * | 2006-02-28 | 2007-09-05 | 盛群半导体股份有限公司 | Delayed comparator |
| CN101197563A (en) * | 2006-12-08 | 2008-06-11 | 英业达股份有限公司 | Magnetic retardation circuit and its amplifier circuit used for comparer |
| US20090027086A1 (en) * | 2007-07-23 | 2009-01-29 | Texas Instruments Incorporated | Comparator and method with controllable threshold and hysteresis |
| CN102075168A (en) * | 2009-11-24 | 2011-05-25 | 华东光电集成器件研究所 | Hysteresis comparator |
| CN102428649A (en) * | 2009-05-18 | 2012-04-25 | 高通股份有限公司 | Comparator with hysteresis |
-
2016
- 2016-05-06 CN CN201610296416.1A patent/CN106026998B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060082392A1 (en) * | 2004-10-15 | 2006-04-20 | Gye-Soo Koo | Comparator with hysteresis and method of comparing using the same |
| CN101030771A (en) * | 2006-02-28 | 2007-09-05 | 盛群半导体股份有限公司 | Delayed comparator |
| CN101197563A (en) * | 2006-12-08 | 2008-06-11 | 英业达股份有限公司 | Magnetic retardation circuit and its amplifier circuit used for comparer |
| US20090027086A1 (en) * | 2007-07-23 | 2009-01-29 | Texas Instruments Incorporated | Comparator and method with controllable threshold and hysteresis |
| CN102428649A (en) * | 2009-05-18 | 2012-04-25 | 高通股份有限公司 | Comparator with hysteresis |
| CN102075168A (en) * | 2009-11-24 | 2011-05-25 | 华东光电集成器件研究所 | Hysteresis comparator |
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| Publication number | Publication date |
|---|---|
| CN106026998B (en) | 2018-11-06 |
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