CN106020267A - Signal acquisition processing system for digital temperature controller based on grid bias circuit - Google Patents
Signal acquisition processing system for digital temperature controller based on grid bias circuit Download PDFInfo
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- CN106020267A CN106020267A CN201610454862.0A CN201610454862A CN106020267A CN 106020267 A CN106020267 A CN 106020267A CN 201610454862 A CN201610454862 A CN 201610454862A CN 106020267 A CN106020267 A CN 106020267A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1917—Control of temperature characterised by the use of electric means using digital means
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
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- Nonlinear Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
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Abstract
The invention discloses a signal acquisition processing system for a digital temperature controller based on a grid bias circuit. The system is characterized in that the system is mainly formed by a temperature sensor U, a resistor R1, a two-stage amplifier circuit, a feedback circuit, a voltage follower circuit and a potentiometer R3 and the like, wherein one end of the resistor R1 is connected with the temperature sensor U, and the other end thereof is grounded through a potentiometer R2; the two-stage amplifier circuit is connected with the temperature sensor U; the feedback circuit and the voltage follower circuit are connected with the two-stage amplifier circuit; and one end of the potentiometer R3 is connected with a power source, the other end is grounded and the control end thereof is connected with the two-stage amplifier circuit. The system can carry out amplification on weak signals output by the temperature sensor and enable waveform of an output signal to keep consistent with that of an input signal, thereby ensuring fidelity of the output signal; besides, the system has a stable quiescent operating point, thereby ensuring the output signal does not have distorting phenomenon; and therefore, temperature measurement precision of the digital temperature controller can be improved, and the digital temperature controller is allowed to control the temperature more accurately.
Description
Technical field
The present invention relates to domain of control temperature, specifically refer to a kind of digital temperature control based on gate bias circuit
Device signal acquiring processing system.
Background technology
Along with the development of science and technology, purpose digital temperature controller has been widely used in the middle of daily commercial production, its
For the temperature of production equipment, environment being detected and controlling, to improve production efficiency and product quality.
But, the signal processing system that existing purpose digital temperature controller is used easily makes signal when to signal processing
Waveform occur distortion, cause purpose digital temperature controller not accurate enough to temperature detection, had a strong impact on it to temperature
The control accuracy of degree.
Summary of the invention
The signal processing system that it is an object of the invention to overcome existing purpose digital temperature controller to be used easily is subject to
Defect to outside electromagnetic interference, it is provided that a kind of purpose digital temperature controller signal based on gate bias circuit is adopted
Collection processing system.
The purpose of the present invention is achieved through the following technical solutions: purpose digital temperature controller based on gate bias circuit
With signal acquiring processing system, mainly by temperature sensor U, one end is connected with temperature sensor U, separately
One end is the resistance R1 of ground connection after potentiometer R2, the two-stage amplifying circuit being connected with temperature sensor U,
The feedback circuit being connected with two-stage amplifying circuit respectively and voltage follower circuit, a termination power, the other end
Ground connection, control the potentiometer R3 that is then connected of end with two-stage amplifying circuit, and respectively with two-stage amplifying circuit
The gate bias circuit composition being connected with voltage follower circuit；The control end of described potentiometer R2 then with resistance
R1 is connected with the junction point of potentiometer R2.
Further, described gate bias circuit is imitated with field by field effect transistor MOS, audion VT3, negative pole
Should the grid of pipe MOS be connected, positive pole is as the electric capacity C8 of the input of this gate bias circuit, positive pole
Be connected with the source electrode of field effect transistor MOS, electric capacity C9, the P pole of negative pole ground connection after resistance R14 and field
Two poles that the grid of effect pipe MOS is connected, N pole negative pole with electric capacity C9 after resistance R12 is connected
Pipe D3, the electric capacity C7 that minus earth, positive pole are connected with the N pole of diode D3 after resistance R11,
One end is connected with the drain electrode of field effect transistor MOS, resistance R13, the P pole of other end ground connection and field effect transistor
The diode D4 that the source electrode of MOS is connected, N pole is connected with the base stage of audion VT3, positive pole and two
The N pole of pole pipe D4 is connected, the electric capacity C11 of minus earth, the emitter stage phase of one end and audion VT3
The leakage of the resistance R16 that connection, the other end are connected with the negative pole of electric capacity C11, positive pole and field effect transistor MOS
Pole is connected, negative pole as the electric capacity C10 of the outfan of this gate bias circuit, positive pole is with electric capacity C10's
The electric capacity C12 that negative pole is connected, negative pole is connected with the colelctor electrode of audion VT3, and with electric capacity C12
The resistance R15 composition being in parallel；The input of described gate bias circuit is connected with two-stage amplifying circuit,
Its outfan is then connected with voltage follower circuit.
Described two-stage amplifying circuit is by amplifier P1, audion VT1, amplifier P3, positive pole and amplifier
The positive pole of P1 is connected, negative pole is connected with the outfan of amplifier P1 electric capacity C1, P pole and amplifier
The diode D1 that the outfan of P1 is connected, N pole base stage with audion VT1 after electric capacity C3 is connected,
It is serially connected in the resistance R7 between positive pole and the outfan of amplifier P3, and the positive pole of one end and amplifier P3
Be connected, the other end then with potentiometer R3 control end be connected resistance R5 composition；Described amplifier P1
Negative pole be connected with temperature sensor U, its outfan is then connected with feedback circuit；Described audion VT1
Emitter stage be connected with feedback circuit, its colelctor electrode then negative pole with amplifier P3 is connected；Described amplification
The outfan of device P3 is connected with feedback circuit and voltage follower circuit respectively；Described gate bias circuit defeated
Enter the end outfan then with amplifier P3 to be connected.
Described feedback circuit is by amplifier P2, and positive pole is connected with the outfan of amplifier P1, negative pole and amplification
The electric capacity C2 that the outfan of device P2 is connected, is serially connected in the resistance between outfan and the negative pole of amplifier P2
R4, the resistance R6 being serially connected between the positive pole of amplifier P2 and the emitter stage of audion VT1, and positive pole
Be connected with the negative pole of amplifier P2, electricity that negative pole outfan with amplifier P3 after resistance R8 is connected
Hold C4 composition；The minus earth of described electric capacity C4.
Described voltage follower circuit by audion VT2, diode D2, the N pole phase of one end and diode D2
Connect, the other end as the resistance R10 of the outfan of this voltage follower circuit, the N of positive pole and diode D2
The electric capacity C6 that pole is connected, negative pole then colelctor electrode with audion VT2 is connected, positive pole and gate bias electricity
The electric capacity C5 that the outfan on road is connected, negative pole is connected with the base stage of audion VT2, and one end and three
The emitter stage of pole pipe VT2 is connected, the resistance R9 of other end ground connection composition.
Described temperature sensor U is AD590 current mode integrated temperature sensor.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) present invention can to temperature sensor output small-signal be amplified, and make output signal with
The waveform of input signal keeps consistent, it is ensured that the fidelity of output signal, such that it is able to improve digital temperature
The temperature detecting precision of control device, enables purpose digital temperature controller to be controlled temperature more accurately.
(2) present invention uses AD590 current mode integrated temperature sensor, and its capacity of resisting disturbance is strong, Ke Yiti
The stability of the high present invention.
(3) present invention has stable quiescent point, so that it is guaranteed that the signal of output does not haves distortion now
As.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the gate bias circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by temperature sensor U, one end is connected with temperature sensor U,
The other end is the resistance R1 of ground connection after potentiometer R2, the two-stage amplifying circuit being connected with temperature sensor U,
The feedback circuit being connected with two-stage amplifying circuit respectively and voltage follower circuit, a termination power, the other end
Ground connection, control the potentiometer R3 that is then connected of end with two-stage amplifying circuit, and respectively with two-stage amplifying circuit
The gate bias circuit composition being connected with voltage follower circuit；The control end of described potentiometer R2 then with resistance
R1 is connected with the junction point of potentiometer R2.In order to preferably implement the present invention, U is excellent in this temperature sensor
Selecting AD590 current mode integrated temperature sensor to realize, this temperature sensor capacity of resisting disturbance is strong, Ke Yiti
The stability of the high present invention.
Wherein, two-stage amplifying circuit is by amplifier P1, audion VT1, amplifier P3, electric capacity C1, electricity
Hold C3, potentiometer R3, resistance R5, resistance R6 and resistance R7 composition.
During connection, the positive pole of electric capacity C1 is connected with the positive pole of amplifier P1, its negative pole and amplifier P1
Outfan is connected.The P pole of diode D1 is connected with the outfan of amplifier P1, its N pole is through electric capacity
After C3, the base stage with audion VT1 is connected.Resistance R7 is serially connected in positive pole and the outfan of amplifier P3
Between.One end of resistance R5 is connected with the positive pole of amplifier P3, its other end then with the control of potentiometer R3
End processed is connected.
Meanwhile, the negative pole of described amplifier P1 be connected with temperature sensor U, its outfan then with feedback electricity
Road is connected.The emitter stage of described audion VT1 is connected with feedback circuit, its colelctor electrode then with amplifier
The negative pole of P3 is connected.The outfan of described amplifier P3 is connected with feedback circuit and voltage follower circuit respectively
Connect；The input of described gate bias circuit then outfan with amplifier P3 is connected.
It addition, described feedback circuit is by amplifier P2, resistance R4, resistance R6, resistance R8, electric capacity C2
And electric capacity C4 composition.The positive pole of this electric capacity C2 is connected with the outfan of amplifier P1, its negative pole with put
The outfan of big device P2 is connected.Resistance R4 is serially connected between outfan and the negative pole of amplifier P2.Resistance
R6 is serially connected between the positive pole of amplifier P2 and the emitter stage of audion VT1.The positive pole of electric capacity C4 with put
The negative pole of big device P2 is connected, its negative pole outfan with amplifier P3 after resistance R8 is connected.Described
The minus earth of electric capacity C4.
This voltage follower circuit is by audion VT2, diode D2, resistance R9, resistance R10, electric capacity C5
And electric capacity C6 composition.
During connection, one end of resistance R10 is connected with the N pole of diode D2, its other end is as this electricity
Press the outfan of follow circuit and connect external control system.The N pole phase of the positive pole of electric capacity C6 and diode D2
Connect, its negative pole then colelctor electrode with audion VT2 is connected.The positive pole of electric capacity C5 and gate bias electricity
The outfan on road is connected, negative pole is connected with the base stage of audion VT2.One end of resistance R9 and three poles
The emitter stage of pipe VT2 is connected, its other end ground connection.
As in figure 2 it is shown, described gate bias circuit is by field effect transistor MOS, audion VT3, resistance R11,
Resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, electric capacity C7, electric capacity C8, electricity
Hold C9, electric capacity C10, electric capacity C11, electric capacity C12, diode D3 and diode D4 composition.
During connection, the negative pole of electric capacity C8 is connected with the grid of field effect transistor MOS, its positive pole is as these grid
The input of pole biasing circuit is also connected with the outfan of amplifier P3.The positive pole of electric capacity C9 and field effect
The source electrode of pipe MOS is connected, its negative pole ground connection after resistance R14.The P pole of diode D3 and field effect
The grid of pipe MOS is connected, its N pole negative pole with electric capacity C9 after resistance R12 is connected.Electric capacity
The minus earth of C7, its positive pole N pole with diode D3 after resistance R11 is connected.Resistance R13's
One end is connected with the drain electrode of field effect transistor MOS, its other end ground connection.The P pole of diode D4 is imitated with field
Should the source electrode of pipe MOS be connected, its N pole is connected with the base stage of audion VT3.Electric capacity C11 is just
Pole is connected with the N pole of diode D4, its minus earth.One end of resistance R16 is with audion VT3's
Emitter stage is connected, its other end is connected with the negative pole of electric capacity C11.The positive pole of electric capacity C10 and field effect
The drain electrode of pipe MOS is connected, its negative pole is as the outfan with electric capacity C5 just of this gate bias circuit
Pole is connected.The positive pole of electric capacity C12 is connected with the negative pole of electric capacity C10, its negative pole and audion VT3
Colelctor electrode is connected.Resistance R15 is in parallel with electric capacity C12.
The small-signal of temperature sensor output can be amplified by the present invention, and makes output signal and input letter
Number waveform keep consistent, it is ensured that the fidelity of output signal, it addition, the present invention has stable static state
Operating point, so that it is guaranteed that the signal of output does not haves distortion phenomenon, the most then can improve digital temperature control
The temperature detecting precision of device, enables purpose digital temperature controller to be controlled temperature more accurately.
As it has been described above, just can well realize the present invention.
Claims (6)
1. purpose digital temperature controller signal acquiring processing system based on gate bias circuit, it is characterised in that
Main by temperature sensor U, one end is connected with temperature sensor U, other end ground connection after potentiometer R2
Resistance R1, the two-stage amplifying circuit being connected with temperature sensor U, be connected with two-stage amplifying circuit respectively
The feedback circuit connect and voltage follower circuit, a termination power, other end ground connection, control end are then put with two-stage
The potentiometer R3 that big circuit is connected, and be connected with two-stage amplifying circuit and voltage follower circuit respectively
Gate bias circuit forms；Described potentiometer R2 control end then with resistance R1 and the connection of potentiometer R2
Point is connected.
At purpose digital temperature controller signals collecting based on gate bias circuit the most according to claim 1
Reason system, it is characterised in that described gate bias circuit is by field effect transistor MOS, audion VT3, negative pole
Be connected with the grid of field effect transistor MOS, positive pole as the electric capacity C8 of the input of this gate bias circuit,
Positive pole is connected with the source electrode of field effect transistor MOS, negative pole electric capacity C9, P pole of ground connection after resistance R14
Be connected with the grid of field effect transistor MOS, N pole negative pole with electric capacity C9 after resistance R12 is connected
Diode D3, the electric capacity that minus earth, positive pole are connected with the N pole of diode D3 after resistance R11
C7, one end is connected with the drain electrode of field effect transistor MOS, resistance R13, the P pole of other end ground connection is imitated with field
Should the diode D4 that source electrode is connected, N pole is connected with the base stage of audion VT3 of pipe MOS, positive pole
Be connected with the N pole of diode D4, the electric capacity C11 of minus earth, the transmitting of one end and audion VT3
The resistance R16 that pole is connected, the other end is connected with the negative pole of electric capacity C11, positive pole and field effect transistor MOS
Drain electrode be connected, negative pole is as the electric capacity C10 of the outfan of this gate bias circuit, positive pole and electric capacity C10
The electric capacity C12 that negative pole is connected, negative pole is connected with the colelctor electrode of audion VT3, and with electric capacity C12
The resistance R15 composition being in parallel；The input of described gate bias circuit is connected with two-stage amplifying circuit,
Its outfan is then connected with voltage follower circuit.
At purpose digital temperature controller signals collecting based on gate bias circuit the most according to claim 2
Reason system, it is characterised in that described two-stage amplifying circuit by amplifier P1, audion VT1, amplifier P3,
The electric capacity C1 that positive pole is connected with the positive pole of amplifier P1, negative pole is connected with the outfan of amplifier P1,
P pole is connected with the outfan of amplifier P1, N pole base stage with audion VT1 after electric capacity C3 is connected
The diode D1 connect, is serially connected in the resistance R7 between positive pole and the outfan of amplifier P3, and one end with
The resistance R5 composition that the positive pole of amplifier P3 is connected, the other end is then connected with the control end of potentiometer R3；
The negative pole of described amplifier P1 is connected with temperature sensor U, its outfan is then connected with feedback circuit；
The emitter stage of described audion VT1 is connected with feedback circuit, its colelctor electrode then with the negative pole phase of amplifier P3
Connect；The outfan of described amplifier P3 is connected with feedback circuit and voltage follower circuit respectively；Described grid
The input of pole biasing circuit then outfan with amplifier P3 is connected.
At purpose digital temperature controller signals collecting based on gate bias circuit the most according to claim 3
Reason system, it is characterised in that described feedback circuit by amplifier P2, the outfan phase of positive pole and amplifier P1
The electric capacity C2 that connection, negative pole are connected with the outfan of amplifier P2, is serially connected in the outfan of amplifier P2
And the resistance R4 between negative pole, it is serially connected between the positive pole of amplifier P2 and the emitter stage of audion VT1
Resistance R6, and positive pole is connected with the negative pole of amplifier P2, negative pole after resistance R8 with amplifier P3
Outfan be connected electric capacity C4 composition；The minus earth of described electric capacity C4.
At purpose digital temperature controller signals collecting based on gate bias circuit the most according to claim 4
Reason system, it is characterised in that described voltage follower circuit is by audion VT2, diode D2, one end and two
The N pole of pole pipe D2 is connected, the other end is as the resistance R10 of the outfan of this voltage follower circuit, positive pole
Be connected with the N pole of diode D2, electric capacity C6 that negative pole then colelctor electrode with audion VT2 is connected,
The electric capacity that positive pole is connected with the outfan of gate bias circuit, negative pole is connected with the base stage of audion VT2
C5, and one end is connected with the emitter stage of audion VT2, the resistance R9 of other end ground connection composition.
At purpose digital temperature controller signals collecting based on gate bias circuit the most according to claim 5
Reason system, it is characterised in that described temperature sensor U is AD590 current mode integrated temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454862.0A CN106020267A (en) | 2016-06-21 | 2016-06-21 | Signal acquisition processing system for digital temperature controller based on grid bias circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454862.0A CN106020267A (en) | 2016-06-21 | 2016-06-21 | Signal acquisition processing system for digital temperature controller based on grid bias circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106020267A true CN106020267A (en) | 2016-10-12 |
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ID=57085720
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610454862.0A Pending CN106020267A (en) | 2016-06-21 | 2016-06-21 | Signal acquisition processing system for digital temperature controller based on grid bias circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106020267A (en) |
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2016
- 2016-06-21 CN CN201610454862.0A patent/CN106020267A/en active Pending
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Application publication date: 20161012 |