JPS57202125A - Variable reference voltage generating circuit - Google Patents
Variable reference voltage generating circuitInfo
- Publication number
- JPS57202125A JPS57202125A JP8677181A JP8677181A JPS57202125A JP S57202125 A JPS57202125 A JP S57202125A JP 8677181 A JP8677181 A JP 8677181A JP 8677181 A JP8677181 A JP 8677181A JP S57202125 A JPS57202125 A JP S57202125A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- reference voltage
- circuit
- geometric
- output
- 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
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
- H03M1/68—Digital/analogue converters with conversions of different sensitivity, i.e. one conversion relating to the more significant digital bits and another conversion to the less significant bits
-
- 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
- H03M1/74—Simultaneous conversion
- H03M1/76—Simultaneous conversion using switching tree
- H03M1/765—Simultaneous conversion using switching tree using a single level of switches which are controlled by unary decoded digital signals
-
- 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
- H03M1/74—Simultaneous conversion
- H03M1/80—Simultaneous conversion using weighted impedances
- H03M1/808—Simultaneous conversion using weighted impedances using resistors
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To generate a reference voltage over a wide range with high resolution, by providing a geometric dividing circuit after a circuit generating an output voltage of geometric series of 2<1/n> relating to an input voltage. CONSTITUTION:One of a specific resistors 2<1/n>R, 2<2/n>R-2<(n-1)/n>R, R inserted in a feedback path of an operational amplifier 21 is selected by closing one of switches 23S1-23Sn with a signal from a control line B. That is, a 2<1/n> geometric ratio voltage is produced at an output of a circuit 2 relating to a voltage Vref of a reference voltage source 10. An output voltage V1 of the circuit 2 is divided into a (1/n) geometric ratio voltage with a voltage dividing resistor 11. One of the divided voltages is selected by closing one of switches 12S1-12Sm with a control signal from a control line A. A reference voltage V2 is obtained from an output terminal 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8677181A JPS57202125A (en) | 1981-06-08 | 1981-06-08 | Variable reference voltage generating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8677181A JPS57202125A (en) | 1981-06-08 | 1981-06-08 | Variable reference voltage generating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57202125A true JPS57202125A (en) | 1982-12-10 |
Family
ID=13896005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8677181A Pending JPS57202125A (en) | 1981-06-08 | 1981-06-08 | Variable reference voltage generating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57202125A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62150935A (en) * | 1985-12-24 | 1987-07-04 | Nec Corp | Reference voltage generating circuit |
FR2642585A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Device for shaping frequency analog signals |
FR2642588A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Device for shaping frequency analog signals, with high dynamic range |
FR2642587A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Enhancements to devices effecting a shaping of frequency analog signals |
FR2642586A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Device for shaping frequency analog signals, exhibiting useful pulses of positive or negative polarity |
DE102009058793B4 (en) * | 2009-06-12 | 2015-09-17 | Analog Devices Inc. | Digital-to-analog converter with circuit architectures to eliminate switch losses |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49123258A (en) * | 1973-03-29 | 1974-11-26 | ||
JPS5560333A (en) * | 1978-10-28 | 1980-05-07 | Sony Corp | Digital-to-analog converter |
-
1981
- 1981-06-08 JP JP8677181A patent/JPS57202125A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49123258A (en) * | 1973-03-29 | 1974-11-26 | ||
JPS5560333A (en) * | 1978-10-28 | 1980-05-07 | Sony Corp | Digital-to-analog converter |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62150935A (en) * | 1985-12-24 | 1987-07-04 | Nec Corp | Reference voltage generating circuit |
FR2642585A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Device for shaping frequency analog signals |
FR2642588A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Device for shaping frequency analog signals, with high dynamic range |
FR2642587A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Enhancements to devices effecting a shaping of frequency analog signals |
FR2642586A1 (en) * | 1989-01-31 | 1990-08-03 | Jaeger | Device for shaping frequency analog signals, exhibiting useful pulses of positive or negative polarity |
DE102009058793B4 (en) * | 2009-06-12 | 2015-09-17 | Analog Devices Inc. | Digital-to-analog converter with circuit architectures to eliminate switch losses |
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