GB1518558A - Analogue-digital conversion - Google Patents

Analogue-digital conversion

Info

Publication number
GB1518558A
GB1518558A GB11926/76A GB1192676A GB1518558A GB 1518558 A GB1518558 A GB 1518558A GB 11926/76 A GB11926/76 A GB 11926/76A GB 1192676 A GB1192676 A GB 1192676A GB 1518558 A GB1518558 A GB 1518558A
Authority
GB
United Kingdom
Prior art keywords
charged
counter
analogue
input
conversion
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.)
Expired
Application number
GB11926/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEN INSTR MICROELECT
Original Assignee
GEN INSTR MICROELECT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GEN INSTR MICROELECT filed Critical GEN INSTR MICROELECT
Priority to GB11926/76A priority Critical patent/GB1518558A/en
Priority to DE19772712440 priority patent/DE2712440A1/en
Priority to SE7703240A priority patent/SE7703240L/en
Priority to FR7708732A priority patent/FR2345857A1/en
Publication of GB1518558A publication Critical patent/GB1518558A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/02—Reversible analogue/digital converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

1518558 A/D and D/A converters GENERAL INSTRUMENT MICROELECTRONICS Ltd 18 March 1977 [24 March 1976] 11926/76 Heading H3H For A-to-D conversion, one of two capacitances Cl, C2 is charged by the analogue input I, the capacitance being selected according to the polarity of the input as determined by a comparator K, then the other capacitance is charged until a predetermined relationship between the voltages on the two capacitances is detected by the comparator, the time required for the latter charging being digitized. The latter charging is done from a constant-current source I1 or I2 according to the capacitor being charged, these sources having opposite polarities. The time is digitized by counting up a counter 7. For D-to-A conversion, the counter 7 is preset with the digital input, apart from the sign bit which selects one of the capacitors C1, C2 which is then charged from the respective source I1, I2 as the counter is counted down to zero at which the analogue output is gated from an operational amplifier K1 fed from the capacitors.
GB11926/76A 1976-03-24 1976-03-24 Analogue-digital conversion Expired GB1518558A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB11926/76A GB1518558A (en) 1976-03-24 1976-03-24 Analogue-digital conversion
DE19772712440 DE2712440A1 (en) 1976-03-24 1977-03-22 ANALOG-DIGITAL CONVERTER
SE7703240A SE7703240L (en) 1976-03-24 1977-03-22 ANALOG-DIGITAL CONVERSION
FR7708732A FR2345857A1 (en) 1976-03-24 1977-03-23 ANALOGUE-DIGITAL CONVERTER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11926/76A GB1518558A (en) 1976-03-24 1976-03-24 Analogue-digital conversion

Publications (1)

Publication Number Publication Date
GB1518558A true GB1518558A (en) 1978-07-19

Family

ID=9995189

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11926/76A Expired GB1518558A (en) 1976-03-24 1976-03-24 Analogue-digital conversion

Country Status (4)

Country Link
DE (1) DE2712440A1 (en)
FR (1) FR2345857A1 (en)
GB (1) GB1518558A (en)
SE (1) SE7703240L (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5589785A (en) * 1994-04-29 1996-12-31 Analog Devices, Inc. Low-voltage CMOS comparator
US5600322A (en) * 1994-04-29 1997-02-04 Analog Devices, Inc. Low-voltage CMOS analog-to-digital converter
US5621409A (en) * 1995-02-15 1997-04-15 Analog Devices, Inc. Analog-to-digital conversion with multiple charge balance conversions
US5668551A (en) * 1995-01-18 1997-09-16 Analog Devices, Inc. Power-up calibration of charge redistribution analog-to-digital converter
US5852415A (en) * 1994-04-29 1998-12-22 Analog Devices, Inc. Charge redistribution analog-to-digital converter with system calibration

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1018272A (en) * 1961-06-23 1966-01-26 Ass Elect Ind Improvements relating to electrical analogue to digital converters
US3603969A (en) * 1968-06-19 1971-09-07 Baxter Laboratories Inc Electronic digital converter
US3877028A (en) * 1974-02-22 1975-04-08 Gte Automatic Electric Lab Inc Pcm encoder-decoder apparatus
US3965467A (en) * 1974-08-12 1976-06-22 Raymond Frederick Monger Analog-to-digital converters

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5589785A (en) * 1994-04-29 1996-12-31 Analog Devices, Inc. Low-voltage CMOS comparator
US5600322A (en) * 1994-04-29 1997-02-04 Analog Devices, Inc. Low-voltage CMOS analog-to-digital converter
US5600275A (en) * 1994-04-29 1997-02-04 Analog Devices, Inc. Low-voltage CMOS comparator with offset cancellation
US5852415A (en) * 1994-04-29 1998-12-22 Analog Devices, Inc. Charge redistribution analog-to-digital converter with system calibration
US5668551A (en) * 1995-01-18 1997-09-16 Analog Devices, Inc. Power-up calibration of charge redistribution analog-to-digital converter
US5621409A (en) * 1995-02-15 1997-04-15 Analog Devices, Inc. Analog-to-digital conversion with multiple charge balance conversions

Also Published As

Publication number Publication date
FR2345857A1 (en) 1977-10-21
FR2345857B1 (en) 1983-06-17
SE7703240L (en) 1977-09-25
DE2712440A1 (en) 1977-10-06

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19970317