CN205844376U - I/F transducer in high precision - Google Patents
I/F transducer in high precision Download PDFInfo
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- CN205844376U CN205844376U CN201620845509.0U CN201620845509U CN205844376U CN 205844376 U CN205844376 U CN 205844376U CN 201620845509 U CN201620845509 U CN 201620845509U CN 205844376 U CN205844376 U CN 205844376U
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Abstract
nullOne can improve reference resistance precision and temperature stability、Be conducive to the high accuracy I/F transducer of circuit miniaturization，Including integrator circuit、Door circuit、Clock circuit、Positive and negative constant flow source circuit、Analog switching circuit、Two road logic circuits and No. two output circuits，Integrator circuit input is the current signal input of whole circuit，Integrator circuit exports after stable triangular wave carries out voltage ratio with door circuit and exports square wave，Square wave and the clock signal superposition exported by clock circuit carry out output Shaping through two road logic circuits，Control positive and negative constant flow source circuit by the switch of control analog switch simultaneously，By output circuit output frequency signal after logic circuit shaping，It is characterized in that: two reference resistances in described positive and negative constant flow source circuit are thick-film resistor，And it is provided with " F " type window or T-shape window near one lateral edges on each reference resistance.
Description
Technical field
This utility model relates to a kind of high accuracy I/F transducer.
Background technology
I/F transducer by integrator circuit, door circuit, clock circuit, positive and negative constant flow source circuit, analog switching circuit,
Two road logic circuits and No. two output circuit six parts composition, circuit connecting relation is shown in Fig. 1.It there is the problem that to carry
The certainty of measurement of high I/F circuit, it is necessary to improve precision and the degree of stability of constant-current source circuit.And the degree of stability of constant-current source mainly depends on
The precision of reference resistance and temperature characterisitic in positive and negative constant flow source circuit, and common its precision of high-accuracy resistance can only achieve
0.5%, temperature characterisitic can only arrive ± 100ppm, it has also become makes the bottleneck problem of high accuracy I/F transducer.
Summary of the invention
The technical problems to be solved in the utility model is to provide one and can improve reference resistance precision and temperature stability, have
It is beneficial to the high accuracy I/F transducer of circuit miniaturization.
The high accuracy I/F transducer that this utility model relates to, including integrator circuit, door circuit, clock circuit, positive and negative
Constant-current source circuit, analog switching circuit, two road logic circuits and No. two output circuits, integrator circuit input is whole circuit
Current signal input, the integrator circuit stable triangular wave of output exports rectangle after carrying out voltage ratio with door circuit
Ripple, square wave and the clock signal superposition exported by clock circuit carry out output Shaping through two road logic circuits, pass through simultaneously
The switch controlling analog switch controls positive and negative constant flow source circuit, by output circuit output frequency after logic circuit shaping
Signal, it is characterized in that: two reference resistances in described positive and negative constant flow source circuit are thick-film resistor, and at each benchmark electricity
It is provided with " F " type window or T-shape window near one lateral edges in resistance.
Further, two reference resistances are respectively equipped with " F " type window and T-shape window near one lateral edges.
Further, described " F " type window and T-shape window are arranged along corresponding thick-film resistor length direction.
The beneficial effects of the utility model are:
Owing to two reference resistances in described positive and negative constant flow source circuit are thick-film resistor, laser correction technique can be used,
Form " F " type window or T-shape window by laser beam on thick-film resistor surface, require meeting resistance value and do not affect electricity
On the premise of stream handling capacity, sampling resistor resistance is modified fine setting, improves reference resistance precision and temperature stability,
After correction, resistance accuracy can reach 0.1%, and reference resistance temperature characterisitic can reach ± 20ppm, so that whole I/F conversion
The certainty of measurement of device improves more than an order of magnitude.And reference resistance uses thick-film resistor, can reduce resistance volume, be conducive to
Circuit miniaturization.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model；
Fig. 2 is reference resistance structural representation in Fig. 1；
In Fig. 1: 1, integrator circuit, 2, door circuit, 3, positive and negative constant flow source circuit, 4, analog switching circuit, 5, logic
Circuit, 6, output circuit, 7, reference resistance, 8, reference resistance, 9, clock circuit.
Detailed description of the invention
As it can be seen, the high accuracy I/F transducer that this utility model relates to, including integrator circuit 1, door circuit 2, time
Clock circuit 9, positive and negative constant flow source circuit 3, analog switching circuit 4, two road logic circuit 5 and No. two output circuits 6, above circuit structure
Becoming hydrid integrated circuit, described positive and negative constant flow source circuit 3 is by the positive constant-current source connected and reference resistance 7 and the negative constant current of series connection
Source and reference resistance 8 are constituted, and integrator circuit 1 input is the current signal input I of whole circuitIN, integrator circuit 1 is defeated
Go out and after stable triangular wave and door circuit 2 carry out voltage ratio, export square wave, square wave and being exported by clock circuit 9
256K clock signal superposition carries out output Shaping through two road logic circuits 5, is controlled by the switch of control analog switch 4 simultaneously
Positive and negative constant flow source circuit 3 processed, by output circuit 6 output frequency signal F+, F-after logic circuit 5 shaping, described positive and negative
Reference resistance 7,8 in constant-current source circuit 3 is thick-film resistor, and near one lateral edges and along its length on reference resistance 7
Direction is provided with " F " type window, on reference resistance 8 near one lateral edges position be provided with along its length T-shape window (or
Near one lateral edges and be provided with T-shape window along its length on reference resistance 7, near one on reference resistance 8
Lateral edges is provided with " F " type window along its length).Or according to resistance correction requirement, near its side on reference resistance 7,8
Edge is also simultaneously provided with " F " type window along its length or is simultaneously provided with "T"-shaped window.
Claims (3)
1. a high accuracy I/F transducer, including integrator circuit, door circuit, clock circuit, positive and negative constant flow source circuit, mould
Intending on-off circuit, two road logic circuits and No. two output circuits, integrator circuit input is that the current signal of whole circuit is defeated
Entering end, the integrator circuit stable triangular wave of output exports square wave after carrying out voltage ratio with door circuit, square wave and by
The clock signal superposition of clock circuit output carries out output Shaping through two road logic circuits, simultaneously by controlling analog switch
Switch controls positive and negative constant flow source circuit, by output circuit output frequency signal after logic circuit shaping, it is characterized in that:
Two reference resistances in described positive and negative constant flow source circuit are thick-film resistor, and near one lateral edges on each reference resistance
It is provided with " F " type window or T-shape window.
High accuracy I/F transducer the most according to claim 1, is characterized in that: near its side on two reference resistances
Edge is respectively equipped with " F " type window and T-shape window.
High accuracy I/F transducer the most according to claim 1, is characterized in that: described " F " type window and T-shape window divide
Do not arrange along corresponding thick-film resistor length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620845509.0U CN205844376U (en) | 2016-08-06 | 2016-08-06 | I/F transducer in high precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620845509.0U CN205844376U (en) | 2016-08-06 | 2016-08-06 | I/F transducer in high precision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205844376U true CN205844376U (en) | 2016-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620845509.0U Active CN205844376U (en) | 2016-08-06 | 2016-08-06 | I/F transducer in high precision |
Country Status (1)
| Country | Link |
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| CN (1) | CN205844376U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395141A (en) * | 2017-06-27 | 2017-11-24 | 珠海市杰理科技股份有限公司 | Power amplifier device |
| CN110471484A (en) * | 2019-08-23 | 2019-11-19 | 西安微电子技术研究所 | A kind of voltage reference source circuit and its application in bypass type I/F conversion circuit |
-
2016
- 2016-08-06 CN CN201620845509.0U patent/CN205844376U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395141A (en) * | 2017-06-27 | 2017-11-24 | 珠海市杰理科技股份有限公司 | Power amplifier device |
| CN107395141B (en) * | 2017-06-27 | 2023-06-02 | 珠海市杰理科技股份有限公司 | Power amplifying device |
| CN110471484A (en) * | 2019-08-23 | 2019-11-19 | 西安微电子技术研究所 | A kind of voltage reference source circuit and its application in bypass type I/F conversion circuit |
| CN110471484B (en) * | 2019-08-23 | 2021-05-25 | 西安微电子技术研究所 | Voltage reference source circuit and application thereof in shunt type I/F conversion circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |