JPS57160220A - Analog to digital converter - Google Patents

Analog to digital converter

Info

Publication number
JPS57160220A
JPS57160220A JP4663281A JP4663281A JPS57160220A JP S57160220 A JPS57160220 A JP S57160220A JP 4663281 A JP4663281 A JP 4663281A JP 4663281 A JP4663281 A JP 4663281A JP S57160220 A JPS57160220 A JP S57160220A
Authority
JP
Japan
Prior art keywords
frequency
noise
pulse source
sampling pulse
sampling
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
Application number
JP4663281A
Other languages
Japanese (ja)
Inventor
Atsushi Tajima
Ryoji Kawasaki
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP4663281A priority Critical patent/JPS57160220A/en
Publication of JPS57160220A publication Critical patent/JPS57160220A/en
Pending 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
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
    • 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
    • H03M1/34—Analogue value compared with reference values
    • H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
    • H03M1/362—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider
    • H03M1/365—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider the voltage divider being a single resistor string

Landscapes

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

Abstract

PURPOSE:To suppress the noise of a sampling pulse source mixed into a digital output signal by integrating a parallel processing type A/D converter by adding a frequency dividing circuit which divides an A/D conversion pulse from the sampling pulse source by N. CONSTITUTION:When the frequency of a sampling pulse source connecting with the A/D conversion pulse input terminal 12 of a parallel processing type A/D converter is NfS and phase noise power spectrum density S (f), the output frequency of an integrated N-frequency-dividing circuit 18 is fs and its noise spectrum density is S (f)/N. Pulses with the frequency fS are applied to a comparator group 15 to sample an analog input signal Vin. During the sampling, a noise from the sampling pulse source is added to the signal Vin, but its level is S (f)/ N, thereby suppressing the mixing of the noise into the signal Vin to 1/N.
JP4663281A 1981-03-30 1981-03-30 Analog to digital converter Pending JPS57160220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4663281A JPS57160220A (en) 1981-03-30 1981-03-30 Analog to digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4663281A JPS57160220A (en) 1981-03-30 1981-03-30 Analog to digital converter

Publications (1)

Publication Number Publication Date
JPS57160220A true JPS57160220A (en) 1982-10-02

Family

ID=12752663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4663281A Pending JPS57160220A (en) 1981-03-30 1981-03-30 Analog to digital converter

Country Status (1)

Country Link
JP (1) JPS57160220A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02200010A (en) * 1989-01-30 1990-08-08 Nec Ic Microcomput Syst Ltd A/d converting circuit
JPH09266445A (en) * 1996-03-28 1997-10-07 Nec Yamagata Ltd A/d converter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158155A (en) * 1978-06-02 1979-12-13 Kubota Ltd Zero tracking circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158155A (en) * 1978-06-02 1979-12-13 Kubota Ltd Zero tracking circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02200010A (en) * 1989-01-30 1990-08-08 Nec Ic Microcomput Syst Ltd A/d converting circuit
JPH09266445A (en) * 1996-03-28 1997-10-07 Nec Yamagata Ltd A/d converter

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