CN116388763A - DAC compatible with voltage/current output - Google Patents
DAC compatible with voltage/current output Download PDFInfo
- Publication number
- CN116388763A CN116388763A CN202310376809.3A CN202310376809A CN116388763A CN 116388763 A CN116388763 A CN 116388763A CN 202310376809 A CN202310376809 A CN 202310376809A CN 116388763 A CN116388763 A CN 116388763A
- Authority
- CN
- China
- Prior art keywords
- output
- voltage
- resistor
- amplifier
- current
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 3
- 101710170230 Antimicrobial peptide 1 Proteins 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- HODRFAVLXIFVTR-RKDXNWHRSA-N tevenel Chemical compound NS(=O)(=O)C1=CC=C([C@@H](O)[C@@H](CO)NC(=O)C(Cl)Cl)C=C1 HODRFAVLXIFVTR-RKDXNWHRSA-N 0.000 description 5
- 101710170231 Antimicrobial peptide 2 Proteins 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 101150112998 ADIPOQ gene Proteins 0.000 description 1
- 101150096655 APM1 gene Proteins 0.000 description 1
- 101100162826 Dictyostelium discoideum apm2 gene Proteins 0.000 description 1
- 101100053794 Homo sapiens ZBTB7C gene Proteins 0.000 description 1
- 102100023250 Zinc finger and BTB domain-containing protein 7C Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
Abstract
The invention discloses a DAC compatible with voltage/current output, comprising: the N-bit resistor DAC module is used for outputting an analog voltage signal; the positive input end of the first amplifier is connected with the output end of the N-bit resistance DAC module; the voltage output module is connected with the reverse input end of the first amplifier and the first output end of the first amplifier and outputs driving voltage through an output pin; the current output module is connected with the reverse input end of the first amplifier and the second output end of the first amplifier; the current output module converts the voltage of the first amplifier into current and outputs driving current through the output pin; the voltage output module and the current output module are respectively provided with a switch, and the output pins are controlled to output driving voltage or driving current by controlling the opening and closing of the switches. The DAC of the invention can output voltage or current only by one PIN, thereby saving chip PINs.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a DAC compatible with voltage/current output.
Background
Optical communication chips typically have both voltage DAC and current DAC requirements to provide bias voltages and bias currents to the optical devices, and existing technologies typically use separate schemes to implement the voltage DAC and the current DAC, i.e., separate modules mainly comprising programmable resistor strings, operational amplifiers of the output stage to achieve adjustable voltage and current outputs, and separate PINs (PINs) to output the voltage and current.
The independent solution requires a relatively large area because of the large number of modules and the operational amplifier of the output stage is also relatively large, since the output usually has a relatively large current load. The separate approach also requires the use of separate pins, which typically require multiple channels of voltage and current DAC in optical communication chip applications, in which case the pin usage of the chip can be very high, placing additional stress on the package.
Therefore, a DAC compatible with voltage/current output is desired, which can save pins of a chip and reduce the area of the chip.
Disclosure of Invention
The invention aims to provide a DAC compatible with voltage/current output, which can output voltage or current only by using one PIN (PIN), and saves chip PINs.
Based on the above object, the present invention provides a DAC compatible with voltage/current output, comprising:
the N-bit resistor DAC module is used for outputting an analog voltage signal;
the positive input end of the first amplifier is connected with the output end of the N-bit resistance DAC module;
the voltage output module is connected with the reverse input end of the first amplifier and the first output end of the first amplifier and outputs driving voltage through an output pin;
the current output module is connected with the reverse input end of the first amplifier and the second output end of the first amplifier; the current output module converts the voltage of the first amplifier into current and outputs driving current through the output pin;
the voltage output module and the current output module are respectively provided with a switch, and the driving voltage or the driving voltage is controlled to be output by the pin through controlling the opening and closing of each switch.
In an alternative, the current output module includes: the first MOS tube, the second MOS tube, the third resistor, the fourth resistor, the conversion resistor, the second switch, the third switch and the third amplifier;
the grid electrode of the first MOS tube is connected to the second output end of the first amplifier through the second switch;
the source electrode of the first MOS tube is connected with the reference ground through the conversion resistor;
the drain electrode of the first MOS tube is connected with the third resistor and the positive input end of the third amplifier;
the third switch is connected between the reverse input end of the first amplifier and the source electrode of the first MOS tube;
the grid electrode of the second MOS tube is connected with the output end of the third amplifier;
the source electrode of the second MOS tube is connected with the reverse input end of the third amplifier and the fourth resistor;
the other end of the third resistor and the other end of the fourth resistor are both used for being connected with an external power supply;
and the drain electrode of the second MOS tube is connected with the output pin.
In an alternative, the current output module includes: the MOS transistor comprises a first MOS transistor, a second MOS transistor, a conversion resistor and a second switch;
one end of the second switch is connected with the reverse input end of the first amplifier, the other end of the second switch is connected with the conversion resistor and the drain electrode of the first MOS tube, and the other end of the conversion resistor is connected with the reference ground;
the grid electrode of the first MOS tube is connected with the second output end of the first amplifier and the grid electrode of the second MOS tube;
the source electrode of the first MOS tube is connected with the source electrode of the second MOS tube and is used for being connected with an external power supply;
and the drain electrode of the second MOS tube is connected with the output pin.
In an alternative, the voltage output module includes: the first resistor, the second resistor, the fourth switch and the fifth switch;
one end of the first resistor is connected with the first output end of the first amplifier, the other end of the first resistor is connected with the second resistor, and the other end of the second resistor is connected with the reference ground through the fifth switch;
the fourth switch is connected between the junction of the first resistor and the second resistor and the inverting input terminal of the first amplifier.
In an alternative, the method further comprises: and the voltage reference module is connected with the N-bit resistance DAC module and used for providing reference voltage for the N-bit resistance DAC module.
In an alternative, the method further comprises: and the current reference module is connected with the N-bit resistance DAC module and used for providing reference current for the N-bit resistance DAC module.
In an alternative, the voltage reference module includes a second amplifier, where a forward input terminal of the second amplifier is used for inputting a voltage, and a reverse input terminal and an output terminal of the second amplifier are connected to the N-bit resistor DAC module.
In an alternative, the current reference module includes an on-chip current source and a first switch connected between the on-chip current source and the N-bit resistive DAC module.
In an alternative scheme, the device further comprises an off-chip filtering module, and the off-chip filtering module is connected to the output end of the output pin.
In an alternative scheme, the off-chip filtering module is a resistor and a capacitor which are arranged in parallel.
The invention has the beneficial effects that:
the DAC can be configured into a voltage output mode and a current output mode, mode switching can be realized through simple switch configuration, voltage or current can be output only by one PIN, and chip PINs are saved.
Furthermore, the N-bit resistor DAC module and the first amplifier are used as a core module, and the voltage/current mode shares the two circuits, so that the circuit area is greatly saved.
The invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, taken in conjunction with the accompanying drawings and the detailed description, which illustrate certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 shows a circuit diagram of a voltage/current output compatible DAC according to an embodiment of the invention.
Fig. 2 shows a circuit diagram of a voltage output mode of the circuit diagram of the structure of fig. 1.
Fig. 3 shows a circuit diagram of a current output mode of the circuit diagram of the structure of fig. 1.
Fig. 4 shows a circuit diagram of a voltage/current output compatible DAC according to another embodiment of the invention.
Fig. 5 shows a circuit diagram of a voltage output mode of the circuit diagram of the structure of fig. 4.
Fig. 6 shows a circuit diagram of a current output mode of the circuit diagram of the structure of fig. 4.
Detailed Description
The present invention will be described in more detail below. While the invention has been provided in connection with the preferred embodiments, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
Referring to fig. 1, the present embodiment provides a voltage/current output compatible DAC, comprising:
the N-bit resistor DAC module is used for outputting an analog voltage signal;
a first amplifier AMP1 having a positive input connected to the output of the N-bit resistive DAC module;
the voltage output module is connected with the reverse input end of the first amplifier APM1 and the first output end of the first amplifier AMP1 and outputs a driving voltage through an output pin;
a current output module connected to an inverting input terminal of the first amplifier AMP1 and a second output terminal of the first amplifier AMP 1; the current output module converts the voltage of the first amplifier AMP1 into current and outputs driving current through the output pin;
the voltage output module and the current output module are respectively provided with a switch, and the output pins are controlled to output driving voltage or driving current by controlling the opening and closing of the switches.
Specifically, the current output module includes: the first MOS tube M1, the second MOS tube M2, the third resistor R3, the fourth resistor R4, the conversion resistor Rvtoi, the second switch SW2, the third switch SW3 and the third amplifier AMP3; the grid electrode of the first MOS tube M1 is connected to the second output end of the first amplifier AMP1 through the second switch SW2; the source electrode of the first MOS tube M1 is connected with a reference ground through the conversion resistor Rvtoi; the drain electrode of the first MOS tube M1 is connected to the third resistor R3 and the positive input end of the third amplifier AMP3; the third switch SW3 is connected between the inverting input terminal of the first amplifier AMP1 and the source electrode of the first MOS transistor M1; the grid electrode of the second MOS tube M2 is connected to the output end of the third amplifier AMP3; the source electrode of the second MOS tube M2 is connected with the reverse input end of the third amplifier AMP3 and the fourth resistor R4; the other end of the third resistor R3 and the other end of the fourth resistor R4 are both used for being connected with an external power supply; the drain electrode of the second MOS tube M2 is connected to the output pin.
The voltage output module includes: a first resistor R1, a second resistor R2, a fourth switch SW4 and a fifth switch SW5; one end of the first resistor R1 is connected to the first output end of the first amplifier AMP1, the other end of the first resistor R1 is connected to the second resistor R2, and the other end of the second resistor R2 is connected to the reference ground through the fifth switch SW5; the fourth switch SW4 is connected between the junction of the first resistor R1 and the second resistor R2 and the inverting input terminal of the first amplifier AMP 1.
The DAC of the present embodiment further includes: and the current reference module and the voltage reference module are connected with the N-bit resistance DAC module and are used for providing reference current and reference voltage for the N-bit resistance DAC module. The voltage reference module includes a second amplifier AMP2, and a positive input terminal of the second amplifier AMP2 is used for inputting a voltage, and a negative input terminal and an output terminal of the second amplifier AMP2 are connected to the N-bit resistor DAC module. The current reference module comprises an on-chip current source iref and a first switch SW1, said first switch SW1 being connected between said on-chip current source iref and said N-bit resistive DAC module.
The DAC of the embodiment further comprises an off-chip filtering module, and the off-chip filtering module is connected to the output end of the output pin. The off-chip filtering module is a resistor RL and a capacitor CL which are arranged in parallel.
Referring to fig. 2, in the voltage output mode, the second amplifier AMP2 provides a reference voltage for the N-bit resistive DAC module, outputs a voltage output providing a current driving capability after passing through the first amplifier AMP1, and R1/R2 is an output gain resistor. The output formula of the Nbit voltage DAC is:
referring to fig. 3, an on-chip current source iref provides a reference current for the N-bit resistance DAC module, and the internal output of the first amplifier AMP1 drives the first MOS transistor M1 to generate a current to be loaded onto the conversion resistor Rvtoi, so as to convert the output voltage of the N-bit resistance DAC module into a current. The current of the first MOS tube M1 flows through a third resistor R3, is amplified and then is output to an output PIN PIN, R3/R4 is the amplification proportion of the output current, and the third amplifier AMP3 drives the second MOS tube M2 to generate output-stage current. The output formula of the Nbit current DAC is as follows:
example 2
The present embodiment differs from embodiment 1 in the structure of the current output module.
Referring to fig. 4, the current output module includes: the MOS transistor comprises a first MOS transistor M1, a second MOS transistor M2, a conversion resistor Rvtoi and a second switch SW2; one end of the second switch SW2 is connected to the inverting input end of the first amplifier AMP1, the other end is connected to the transforming resistor Rvtoi and the drain electrode of the first MOS transistor M1, and the other end of the transforming resistor Rvtoi is connected to the reference ground; the grid electrode of the first MOS tube M1 is connected with the second output end of the first amplifier Rvtoi and the grid electrode of the second MOS tube M2; the source electrode of the first MOS tube M1 is connected with the source electrode of the second MOS tube M2 and is used for being connected with an external power supply; the drain electrode of the second MOS tube M2 is connected to the output pin.
Referring to fig. 5, the voltage output mode operates in the same principle and structure as embodiment 1.
Referring to fig. 6, in the current output mode, the first amplifier AMP1 drives the first MOS transistor M1 to convert the output of the N-bit resistor DAC module into a current, and the current flows through the conversion resistor Rvtoi, and is amplified by the second MOS transistor M2 in a mirror image manner and then is output to the output PIN. The current amplification ratio is the ratio K of the dimensions of M2/M1. The output formula of the Nbit current DAC is as follows:
compared with the current mode of embodiment 1, the current mode of this embodiment is more susceptible to the influence of the output voltage, and if the output voltage is relatively high, the second MOS transistor M2 enters the linear region, so that the current mirror accuracy is lost. Example 1 the current ratio is achieved by a resistor and the accuracy is not easily affected by the voltage. The structure of embodiment 1 is recommended if higher current accuracy is pursued, and the structure of embodiment 2 is recommended if smaller area is pursued. The accuracy in the voltage mode of this embodiment is the same as that of embodiment 1.
The DAC can be configured into a voltage output mode and a current output mode, mode switching can be realized through simple switch configuration, voltage or current can be output only by one PIN, and chip PINs are saved.
Furthermore, the N-bit resistor DAC module and the first amplifier are used as a core module, and the voltage/current mode shares the two circuits, so that the circuit area is greatly saved.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. A voltage/current output compatible DAC comprising:
the N-bit resistor DAC module is used for outputting an analog voltage signal;
the positive input end of the first amplifier is connected with the output end of the N-bit resistance DAC module;
the voltage output module is connected with the reverse input end of the first amplifier and the first output end of the first amplifier and outputs driving voltage through an output pin;
the current output module is connected with the reverse input end of the first amplifier and the second output end of the first amplifier; the current output module converts the voltage of the first amplifier into current and outputs driving current through the output pin;
the voltage output module and the current output module are respectively provided with a switch, and the output pins are controlled to output driving voltage or driving current by controlling the opening and closing of the switches.
2. The voltage/current output compatible DAC of claim 1 wherein the current output module comprises: the first MOS tube, the second MOS tube, the third resistor, the fourth resistor, the conversion resistor, the second switch, the third switch and the third amplifier;
the grid electrode of the first MOS tube is connected to the second output end of the first amplifier through the second switch;
the source electrode of the first MOS tube is connected with the reference ground through the conversion resistor;
the drain electrode of the first MOS tube is connected with the third resistor and the positive input end of the third amplifier;
the third switch is connected between the reverse input end of the first amplifier and the source electrode of the first MOS tube;
the grid electrode of the second MOS tube is connected with the output end of the third amplifier;
the source electrode of the second MOS tube is connected with the reverse input end of the third amplifier and the fourth resistor;
the other end of the third resistor and the other end of the fourth resistor are both used for being connected with an external power supply;
and the drain electrode of the second MOS tube is connected with the output pin.
3. The voltage/current output compatible DAC of claim 1 wherein the current output module comprises: the MOS transistor comprises a first MOS transistor, a second MOS transistor, a conversion resistor and a second switch;
one end of the second switch is connected with the reverse input end of the first amplifier, the other end of the second switch is connected with the conversion resistor and the drain electrode of the first MOS tube, and the other end of the conversion resistor is connected with the reference ground;
the grid electrode of the first MOS tube is connected with the second output end of the first amplifier and the grid electrode of the second MOS tube;
the source electrode of the first MOS tube is connected with the source electrode of the second MOS tube and is used for being connected with an external power supply;
and the drain electrode of the second MOS tube is connected with the output pin.
4. The voltage/current output compatible DAC of claim 1 wherein the voltage output module comprises: the first resistor, the second resistor, the fourth switch and the fifth switch;
one end of the first resistor is connected with the first output end of the first amplifier, the other end of the first resistor is connected with the second resistor, and the other end of the second resistor is connected with the reference ground through the fifth switch;
the fourth switch is connected between the junction of the first resistor and the second resistor and the inverting input terminal of the first amplifier.
5. The voltage/current output compatible DAC of claim 1 further comprising: and the voltage reference module is connected with the N-bit resistance DAC module and used for providing reference voltage for the N-bit resistance DAC module.
6. The voltage/current output compatible DAC of claim 1 further comprising: and the current reference module is connected with the N-bit resistance DAC module and used for providing reference current for the N-bit resistance DAC module.
7. The voltage/current output compatible DAC of claim 5 wherein the voltage reference module comprises a second amplifier having a forward input for the input voltage and a reverse input and output connected to the N-bit resistive DAC module.
8. The voltage/current output compatible DAC of claim 6 wherein the current reference module comprises an on-chip current source and a first switch connected between the on-chip current source and the N-bit resistive DAC module.
9. The voltage/current output compatible DAC of claim 1 further comprising an off-chip filter module connected to the output of the output pin.
10. The voltage/current output compatible DAC of claim 9 wherein the off-chip filtering module is a resistor and capacitor arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310376809.3A CN116388763B (en) | 2023-04-10 | 2023-04-10 | DAC compatible with voltage/current output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310376809.3A CN116388763B (en) | 2023-04-10 | 2023-04-10 | DAC compatible with voltage/current output |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116388763A true CN116388763A (en) | 2023-07-04 |
| CN116388763B CN116388763B (en) | 2023-12-22 |
Family
ID=86978461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310376809.3A Active CN116388763B (en) | 2023-04-10 | 2023-04-10 | DAC compatible with voltage/current output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116388763B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117411488A (en) * | 2023-12-11 | 2024-01-16 | 杭州晶华微电子股份有限公司 | Digital-to-analog conversion circuit with dual-mode output and digital-to-analog conversion chip |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090167579A1 (en) * | 2007-12-28 | 2009-07-02 | Nec Electronics Corporation | D/a conversion circuit |
| CN202257335U (en) * | 2011-09-14 | 2012-05-30 | 深圳市亿维自动化技术有限公司 | Voltage and current output device |
| CN203423692U (en) * | 2013-07-26 | 2014-02-05 | 厦门优迅高速芯片有限公司 | Compatible average optical power monitoring circuit |
| CN203775149U (en) * | 2014-03-28 | 2014-08-13 | 深圳创维－Rgb电子有限公司 | Class-D power amplification chip with power limiting function and audio play device |
| CN104600963A (en) * | 2014-12-30 | 2015-05-06 | 上海贝岭股份有限公司 | Output voltage dual-mode detection circuit of switching power supply |
| CN106406411A (en) * | 2016-12-08 | 2017-02-15 | 上海爱信诺航芯电子科技有限公司 | Low dropout regulator circuit and power supply |
| CN209911859U (en) * | 2019-07-12 | 2020-01-07 | 成都恩菲特科技有限公司 | Program-controlled voltage/current output switching circuit and system |
| CN210327382U (en) * | 2019-09-12 | 2020-04-14 | 苏州汇川技术有限公司 | Elevator band-type brake power supply |
| CN214278265U (en) * | 2020-10-27 | 2021-09-24 | 深钛智能科技(苏州)有限公司 | High-precision programmable power supply |
| CN114337304A (en) * | 2021-12-31 | 2022-04-12 | 苏州源特半导体科技有限公司 | Control chip and built-in MOS tube driving speed control method thereof |
| CN216649667U (en) * | 2022-05-06 | 2022-05-31 | 深圳市杰曼科技股份有限公司 | Analog quantity voltage and current output circuit of weighing instrument |
-
2023
- 2023-04-10 CN CN202310376809.3A patent/CN116388763B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090167579A1 (en) * | 2007-12-28 | 2009-07-02 | Nec Electronics Corporation | D/a conversion circuit |
| CN202257335U (en) * | 2011-09-14 | 2012-05-30 | 深圳市亿维自动化技术有限公司 | Voltage and current output device |
| CN203423692U (en) * | 2013-07-26 | 2014-02-05 | 厦门优迅高速芯片有限公司 | Compatible average optical power monitoring circuit |
| CN203775149U (en) * | 2014-03-28 | 2014-08-13 | 深圳创维－Rgb电子有限公司 | Class-D power amplification chip with power limiting function and audio play device |
| CN104600963A (en) * | 2014-12-30 | 2015-05-06 | 上海贝岭股份有限公司 | Output voltage dual-mode detection circuit of switching power supply |
| CN106406411A (en) * | 2016-12-08 | 2017-02-15 | 上海爱信诺航芯电子科技有限公司 | Low dropout regulator circuit and power supply |
| CN209911859U (en) * | 2019-07-12 | 2020-01-07 | 成都恩菲特科技有限公司 | Program-controlled voltage/current output switching circuit and system |
| CN210327382U (en) * | 2019-09-12 | 2020-04-14 | 苏州汇川技术有限公司 | Elevator band-type brake power supply |
| CN214278265U (en) * | 2020-10-27 | 2021-09-24 | 深钛智能科技(苏州)有限公司 | High-precision programmable power supply |
| CN114337304A (en) * | 2021-12-31 | 2022-04-12 | 苏州源特半导体科技有限公司 | Control chip and built-in MOS tube driving speed control method thereof |
| CN216649667U (en) * | 2022-05-06 | 2022-05-31 | 深圳市杰曼科技股份有限公司 | Analog quantity voltage and current output circuit of weighing instrument |
Non-Patent Citations (3)
| Title |
|---|
| TONG XINGYUAN;WANG CHAOFENG;: "A 10-bit 500-MS/s Current Steering DAC with Improved Random Layout", CHINESE JOURNAL OF ELECTRONICS, no. 01, pages 114 - 117 * |
| 董高森;姚洁;: "基于FPGA的通用DAC模块设计", 自动化应用, no. 05, pages 225 - 229 * |
| 赵豇瑶;黄伟;: "一种高精度多功能校验仪信号输出部分电路设计", 内燃机与配件, no. 04, pages 191 - 195 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117411488A (en) * | 2023-12-11 | 2024-01-16 | 杭州晶华微电子股份有限公司 | Digital-to-analog conversion circuit with dual-mode output and digital-to-analog conversion chip |
| CN117411488B (en) * | 2023-12-11 | 2024-03-26 | 杭州晶华微电子股份有限公司 | Digital-to-analog conversion circuit with dual-mode output and digital-to-analog conversion chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116388763B (en) | 2023-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI451690B (en) | Trans-impedance amplifier | |
| US20060202763A1 (en) | Current mirror circuit | |
| US7605656B2 (en) | Operational amplifier with rail-to-rail common-mode input and output range | |
| CN116388763B (en) | DAC compatible with voltage/current output | |
| US7352193B2 (en) | Voltage-impressed current measuring apparatus and current buffers with switches used therefor | |
| CN111213389A (en) | Current measurement at the output of a switching amplifier | |
| CN117155296B (en) | Current loop error amplifying circuit and driving chip | |
| US6262627B1 (en) | Integrated power amplifier which allows parallel connections | |
| US7215187B2 (en) | Symmetrically matched voltage mirror and applications therefor | |
| US8085092B2 (en) | Amplifier arrangement and method for amplification | |
| US7663438B2 (en) | Differential amplifier circuit | |
| US7956784B2 (en) | DA converter including conversion amplifier having output voltage with improved linearity | |
| Falconi et al. | Current-mode high-accuracy high-precision CMOS amplifiers | |
| KR940003086B1 (en) | D/a converter | |
| CN114518486A (en) | Method and circuit for measuring input offset voltage | |
| CN107888184B (en) | Single-end-to-differential circuit and buffer circuit and sample hold circuit formed by same | |
| US7321245B2 (en) | Pipelined AD converter capable of switching current driving capabilities | |
| CN112600521B (en) | Switch circuit for adjusting offset voltage of amplifier, adjusting circuit and amplifier | |
| CN112825477A (en) | High-voltage operational amplifier and input stage circuit thereof | |
| CN111458554B (en) | High-precision current monitoring circuit | |
| CN106603023B (en) | Dual-power amplifier circuit | |
| US7518454B2 (en) | Operational amplifier selecting one of inputs, and an amplifying apparatus using the OP amplifier the verification method | |
| CN112947218B (en) | Precision improving circuit and method of current detection amplifier | |
| CN214474690U (en) | High-precision current output adjustable circuit structure | |
| WO2022165801A1 (en) | Communication apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |