CS178183A3 - Delta-sigma modulator - Google Patents

Delta-sigma modulator

Info

Publication number
CS178183A3
CS178183A3 CS831781A CS178183A CS178183A3 CS 178183 A3 CS178183 A3 CS 178183A3 CS 831781 A CS831781 A CS 831781A CS 178183 A CS178183 A CS 178183A CS 178183 A3 CS178183 A3 CS 178183A3
Authority
CS
Czechoslovakia
Prior art keywords
input signal
integrator
delta
sigma modulator
sampling circuit
Prior art date
Application number
CS831781A
Other languages
Czech (cs)
Other versions
CS276581B6 (en
Inventor
Kishan Shenoi
Bhagwati Prasad Agrawal
Original Assignee
Alcatel Nv
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 Alcatel Nv filed Critical Alcatel Nv
Priority to CS831781A priority Critical patent/CS276581B6/en
Publication of CS178183A3 publication Critical patent/CS178183A3/en
Publication of CS276581B6 publication Critical patent/CS276581B6/en

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  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

The Delta-Sigma modulator for digitally encoding an analogue input signal includes a clock (303) for generating a timing waveform having a frequency higher than the highest frequency component of an analogue input signal. A sampling circuit (1,3,C1), including a switching capacitance, stores charge representative of instantaneous amplitude values of the input signal. An integrator (4,C), operative as a low-pass filter, is responsive to the output of the sampling circuit. - A one-bit A to D converter (19,20), clocked by the timing waveform, provides two complementary outputs (Q,Q) in response to the instantaneous polarity of the integrator output. A reference circuit (301) selectively applies a charging voltage to the integrator. This arrangement is for use in a telephone voice channel and its performance does not depend on the absolute values of capacitors and resistors.
CS831781A 1983-03-15 1983-03-15 Delta-sigma modulator CS276581B6 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CS831781A CS276581B6 (en) 1983-03-15 1983-03-15 Delta-sigma modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS831781A CS276581B6 (en) 1983-03-15 1983-03-15 Delta-sigma modulator

Publications (2)

Publication Number Publication Date
CS178183A3 true CS178183A3 (en) 1992-02-19
CS276581B6 CS276581B6 (en) 1992-07-15

Family

ID=5353076

Family Applications (1)

Application Number Title Priority Date Filing Date
CS831781A CS276581B6 (en) 1983-03-15 1983-03-15 Delta-sigma modulator

Country Status (1)

Country Link
CS (1) CS276581B6 (en)

Also Published As

Publication number Publication date
CS276581B6 (en) 1992-07-15

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