GB1504528A - Pulse code modulation encoders - Google Patents

Pulse code modulation encoders

Info

Publication number
GB1504528A
GB1504528A GB25881/74A GB2588174A GB1504528A GB 1504528 A GB1504528 A GB 1504528A GB 25881/74 A GB25881/74 A GB 25881/74A GB 2588174 A GB2588174 A GB 2588174A GB 1504528 A GB1504528 A GB 1504528A
Authority
GB
United Kingdom
Prior art keywords
analogue
output
digital
binary
adc2
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
GB25881/74A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB25881/74A priority Critical patent/GB1504528A/en
Priority to FR7518004A priority patent/FR2330208A1/en
Publication of GB1504528A publication Critical patent/GB1504528A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging

Landscapes

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

Abstract

1504528 Analogue-to-digital conversion PLESSEY CO Ltd 20 May 1975 [11 June 1974] 25881/74 Heading H3H In analogue-to-digital conversion, coarse and fine converters ADC1, ADC2 each produce a digital byte including a sign bit, the bytes being added (or subtracted) in digital adder DA. As shown, ADC1 produces a sign bit and 5 binary weighted amplitude bits, the difference between the output of digital-to-analogue converter DAC and the input analogue IS being amplified by 2<SP>5</SP> before passing to ADC2. Each A-to-D converter comprises a cascade of one-bit stages, producing a binary Gray code, converted to natural binary at G/BC1 and G/BC2. Each stage, Fig. 2, comprises an inverting amplifier A2 of unity gain a comparator CA1 giving the binary output of the stage at DO, and a full-wave rectifier controlled by the output of the comparator, the diodes being forward biased to achieve high linearity and avoid open circuit condition at zero input which would give rise to a spurious output. Relative values of the resistors are given.
GB25881/74A 1974-06-11 1974-06-11 Pulse code modulation encoders Expired GB1504528A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB25881/74A GB1504528A (en) 1974-06-11 1974-06-11 Pulse code modulation encoders
FR7518004A FR2330208A1 (en) 1974-06-11 1975-06-10 CODING DEVICE WITH CODED PULSE MODULATION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25881/74A GB1504528A (en) 1974-06-11 1974-06-11 Pulse code modulation encoders

Publications (1)

Publication Number Publication Date
GB1504528A true GB1504528A (en) 1978-03-22

Family

ID=10234893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25881/74A Expired GB1504528A (en) 1974-06-11 1974-06-11 Pulse code modulation encoders

Country Status (2)

Country Link
FR (1) FR2330208A1 (en)
GB (1) GB1504528A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078687A2 (en) * 1981-10-30 1983-05-11 Sony Corporation Analog to digital converter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2034992B (en) * 1978-11-17 1983-09-01 Burr Brown Res Corp Analogue-to-digital converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078687A2 (en) * 1981-10-30 1983-05-11 Sony Corporation Analog to digital converter
EP0078687B1 (en) * 1981-10-30 1987-10-14 Sony Corporation Analog to digital converter

Also Published As

Publication number Publication date
FR2330208A1 (en) 1977-05-27
FR2330208B1 (en) 1982-03-26

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee