CN101471663A - D/A converter circuit and D/A converting method - Google Patents
D/A converter circuit and D/A converting method Download PDFInfo
- Publication number
- CN101471663A CN101471663A CNA200710094648XA CN200710094648A CN101471663A CN 101471663 A CN101471663 A CN 101471663A CN A200710094648X A CNA200710094648X A CN A200710094648XA CN 200710094648 A CN200710094648 A CN 200710094648A CN 101471663 A CN101471663 A CN 101471663A
- Authority
- CN
- China
- Prior art keywords
- resistance
- digital
- input
- circuit
- voltage amplifier
- 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.)
- Pending
Links
Images
Landscapes
- Analogue/Digital Conversion (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a digital-analog converter circuit, which comprises a plurality of resistors connected in series between a power terminal and a ground terminal. The resistance of a resistor closest to the power terminal is larger than those of other resistors; and a switch controlled by a digital signal of a digital signal input terminal is connected between each of the other resistors and an input terminal of a voltage amplifying circuit respectively. The invention also discloses a digital-analog conversion method with steps as follows: through the partial pressure of the resistors with larger resistances and closest to the power terminal, an analog signal input into the voltage amplifying circuit can be kept within a low amplitude, and then the low amplitude analog signal is amplified to the normal amplitude for output by the voltage amplifying circuit. Through simple regulation of the partial pressure and the proportional resistance, the invention can conveniently control the output of the digital-analog converter circuit, remarkably reduce the design complexity, and efficiently inhibit the influence of the power on the performance of the digital-analog converter circuit by adding a capacitor between the resistors closest to the power terminal in an equal proportion partial pressure resistor string.
Description
Technical field
The present invention relates to a kind of circuit, especially a kind of D/A converting circuit.The invention still further relates to a kind of method of digital-to-analogue conversion.
Background technology
The structure of traditional digital to analog converter as shown in Figure 1, its output stage generally adopts voltage follower, voltage follower can be made up of operational amplifier OPA, analog signal is imported by normal phase input end, output feeds back to inverting input.Because the restriction of transistor self character, if the realistic width of cloth (rail-to-rail) of now expiring is exported, logarithmic mode transducer and amplifier design all have very high requirement.Simultaneously the performance that power supply noise also can the logarithmic mode transducer is brought very big influence, strengthens Power Supply Rejection Ratio and also be an emphasis in the design.
Summary of the invention
Technical problem to be solved by this invention provides a kind of d convertor circuit, and a kind of digital-analog convertion method, can solve d convertor circuit, the bottleneck problem that comprises the full width of cloth output of its output-stage circuit, reduce the design difficulty of rail-to-rail output, strengthen the Power Supply Rejection Ratio of d convertor circuit simultaneously.
For solving the problems of the technologies described above, the technical scheme of d convertor circuit of the present invention is, comprise a plurality of resistance that are connected between power end and the earth terminal, the resistance of described the most close power end is greater than other each resistance, the resistance of described other each resistance equates, also comprise a voltage amplifier circuit, the interconnective node of described other each resistance, and the node that is connected with earth terminal of last resistance, respectively be connected with a switch between the input of above-mentioned node and described voltage amplifier circuit by the Digital Signals of digital signal input end.
The present invention also provides a kind of digital-analog convertion method, its technical scheme is, by the described dividing potential drop of the big resistance resistance of close power end, in making that the analog signal that is input to described voltage amplifier circuit remains on by a small margin, by described voltage amplifier circuit analog signal by a small margin is amplified to normal amplitude output then.
The present invention just can control the output of d convertor circuit easily by simple size of regulating dividing potential drop and proportion resistor, has significantly reduced the complexity of design, and power supply logarithmic mode converter circuit Effect on Performance has also obtained very big inhibition simultaneously.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and Examples:
Fig. 1 is the circuit diagram of existing d convertor circuit;
Fig. 2 is the circuit diagram of d convertor circuit of the present invention.
Embodiment
D convertor circuit of the present invention, as shown in Figure 2, comprise a plurality of resistance that are connected between power end and the earth terminal, the resistance of described the most close power end is greater than other each resistance, the resistance of described other each resistance equates, also comprise a voltage amplifier circuit, the interconnective node of described other each resistance, and the node that is connected with earth terminal of last resistance, respectively be connected with a switch between the input of above-mentioned node and described voltage amplifier circuit by the Digital Signals of digital signal input end.
The described resistance of close power end is variable resistor.
Connect between end of other resistance and the ground at described variable resistor and to be connected with an electric capacity.Be used for suppressing effectively power supply logarithmic mode converter circuit Effect on Performance.
Described voltage amplifier circuit comprises an operational amplifier OPA, the normal phase input end of described operational amplifier is the input of voltage amplifier circuit, the output of described operational amplifier is connected to inverting input by a resistance, and the inverting input of described operational amplifier is by going back a grounding through resistance.
The digital-analog convertion method that the present invention also provides a kind of above-mentioned d convertor circuit to realize, by the described dividing potential drop of the big resistance resistance of close power end, in making that the analog signal that is input to described voltage amplifier circuit remains on by a small margin, by described voltage amplifier circuit analog signal by a small margin is amplified to normal amplitude output then.
By described variable resistor is regulated, control is input to the amplitude of the analog signal of described voltage amplifier circuit.
In sum, the present invention is by simple size of regulating dividing potential drop and proportion resistor, just can control the output of d convertor circuit easily, significantly reduce the complexity of design, power supply logarithmic mode converter circuit Effect on Performance has also obtained very big inhibition simultaneously.
Claims (6)
1. d convertor circuit, comprise a plurality of resistance that are connected between power end and the earth terminal, it is characterized in that, the resistance of described the most close power end is greater than other each resistance, the resistance of described other each resistance equates, also comprise a voltage amplifier circuit, the interconnective node of described other each resistance, and the node that is connected with earth terminal of last resistance, respectively be connected with a switch between the input of above-mentioned node and described voltage amplifier circuit by the Digital Signals of digital signal input end.
2. d convertor circuit according to claim 1 is characterized in that, the described resistance of close power end is variable resistor.
3. d convertor circuit according to claim 2 is characterized in that, connects between end of other resistance and the ground at described variable resistor to be connected with an electric capacity.
4. d convertor circuit according to claim 1, it is characterized in that, described voltage amplifier circuit comprises an operational amplifier, the normal phase input end of described operational amplifier is the input of voltage amplifier circuit, the output of described operational amplifier is connected to inverting input by a resistance, and the inverting input of described operational amplifier is by going back a grounding through resistance.
5. digital-analog convertion method that realizes as any described d convertor circuit in the claim 1 to 4, it is characterized in that, by the described dividing potential drop of the big resistance resistance of close power end, in making that the analog signal that is input to described voltage amplifier circuit remains on by a small margin, by described voltage amplifier circuit analog signal by a small margin is amplified to normal amplitude output then.
6. digital-analog convertion method according to claim 5 is characterized in that, by described variable resistor is regulated, control is input to the amplitude of the analog signal of described voltage amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710094648XA CN101471663A (en) | 2007-12-28 | 2007-12-28 | D/A converter circuit and D/A converting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710094648XA CN101471663A (en) | 2007-12-28 | 2007-12-28 | D/A converter circuit and D/A converting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101471663A true CN101471663A (en) | 2009-07-01 |
Family
ID=40828826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710094648XA Pending CN101471663A (en) | 2007-12-28 | 2007-12-28 | D/A converter circuit and D/A converting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101471663A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105188204A (en) * | 2015-08-26 | 2015-12-23 | 中国科学院上海高等研究院 | Digital-to-analog conversion circuit and method for AMOLED column driver circuit |
| CN105210298A (en) * | 2013-03-15 | 2015-12-30 | 亚德诺半导体集团 | Multiple string digital to analog converter |
| CN107192864A (en) * | 2017-06-15 | 2017-09-22 | 西安微电子技术研究所 | A kind of Precision digital resistor load circuit |
| CN109787635A (en) * | 2019-01-10 | 2019-05-21 | 京东方科技集团股份有限公司 | D/A converting circuit and its digital-analog convertion method, display device |
| CN113252959A (en) * | 2021-05-08 | 2021-08-13 | 国网冀北电力有限公司计量中心 | Multi-transformation ratio AC voltage divider |
| CN113994221A (en) * | 2019-05-31 | 2022-01-28 | 大金工业株式会社 | Power measuring device and power measuring method |
| CN115469295A (en) * | 2022-11-02 | 2022-12-13 | 北醒（北京）光子科技有限公司 | Laser radar receiving circuit, analog front end, laser radar and signal processing method |
| WO2023044847A1 (en) * | 2021-09-26 | 2023-03-30 | 京东方科技集团股份有限公司 | Phase shifter and method for using same, and antenna system |
-
2007
- 2007-12-28 CN CNA200710094648XA patent/CN101471663A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105210298A (en) * | 2013-03-15 | 2015-12-30 | 亚德诺半导体集团 | Multiple string digital to analog converter |
| CN105210298B (en) * | 2013-03-15 | 2019-11-05 | 亚德诺半导体集团 | More string digital to analog converter |
| CN105188204A (en) * | 2015-08-26 | 2015-12-23 | 中国科学院上海高等研究院 | Digital-to-analog conversion circuit and method for AMOLED column driver circuit |
| CN107192864A (en) * | 2017-06-15 | 2017-09-22 | 西安微电子技术研究所 | A kind of Precision digital resistor load circuit |
| CN109787635A (en) * | 2019-01-10 | 2019-05-21 | 京东方科技集团股份有限公司 | D/A converting circuit and its digital-analog convertion method, display device |
| WO2020143398A1 (en) * | 2019-01-10 | 2020-07-16 | 京东方科技集团股份有限公司 | Digital to analog conversion circuit, digital to analog conversion method, and display device |
| US11296718B2 (en) | 2019-01-10 | 2022-04-05 | Boe Technology Group Co., Ltd. | Digital-to-analog conversion circuit, digital-to-analog conversion method, and display apparatus |
| CN113994221A (en) * | 2019-05-31 | 2022-01-28 | 大金工业株式会社 | Power measuring device and power measuring method |
| US12019103B2 (en) | 2019-05-31 | 2024-06-25 | Daikin Industries, Ltd. | Power measurement apparatus and power measurement method |
| CN113252959A (en) * | 2021-05-08 | 2021-08-13 | 国网冀北电力有限公司计量中心 | Multi-transformation ratio AC voltage divider |
| WO2023044847A1 (en) * | 2021-09-26 | 2023-03-30 | 京东方科技集团股份有限公司 | Phase shifter and method for using same, and antenna system |
| CN115469295A (en) * | 2022-11-02 | 2022-12-13 | 北醒（北京）光子科技有限公司 | Laser radar receiving circuit, analog front end, laser radar and signal processing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101471663A (en) | D/A converter circuit and D/A converting method | |
| CN101917169B (en) | High-bandwidth low-power consumption frequency-compensation three-stage operational amplifier | |
| CN103178852B (en) | A kind of high-speed sampling front-end circuit | |
| CN104485897B (en) | A kind of correlated-double-sampling switched capacitor amplifier of offset compensation | |
| CN101692603B (en) | Gain bootstrap type C class reverser and application circuit thereof | |
| CN107623495A (en) | Low noise circuit | |
| CN104639068B (en) | The linear programmable gain amplifier that a kind of switching capacity is realized | |
| CN102386859A (en) | Wide band amplifier with frequency compensation | |
| CN101640829B (en) | Digital preamplifier for MEMS microphone | |
| CN107135002A (en) | Switched-capacitor input circuit, switched capacitor amplifier and switching capacity voltage comparator | |
| CN101414487A (en) | Device and method for holding sampling | |
| CN104639168A (en) | Sigma-Delta type analog-to-digital converter analog front end circuit | |
| CN101521496B (en) | Low-gain switching capacitor in-phase integrator with insensitive parasitic effect and low power consumption | |
| CN203278797U (en) | Zero optimization integrator circuit | |
| CN207910761U (en) | A kind of high speed reference buffer circuit applied to high-speed AD converter | |
| CN106549645A (en) | Pre-amplifier | |
| CN100542019C (en) | The output-stage circuit of operational amplifier | |
| CN201319585Y (en) | Gain amplitude limit circuit | |
| CN203423670U (en) | Variable-gain analog adder | |
| CN203278793U (en) | Integrator circuit | |
| CN214315206U (en) | Comparator and CAN communication chip | |
| US20140176358A1 (en) | Method of producing low-power switched-capacitor amplifier, circuit and a pipeline analog-to-digital converter including the same | |
| CN109861650A (en) | The operational amplification circuit of adjustable reference voltage value | |
| CN217360612U (en) | Elevator analog quantity output circuit | |
| CN102480295B (en) | Analog-to-digital converter and analog-to-digital conversion method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090701 |