FI920379A - Sigma-delta modulator - Google Patents

Sigma-delta modulator Download PDF

Info

Publication number
FI920379A
FI920379A FI920379A FI920379A FI920379A FI 920379 A FI920379 A FI 920379A FI 920379 A FI920379 A FI 920379A FI 920379 A FI920379 A FI 920379A FI 920379 A FI920379 A FI 920379A
Authority
FI
Finland
Prior art keywords
modulator
quantizing
error
sigma
signal
Prior art date
Application number
FI920379A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI92533C (en
FI92533B (en
FI920379A0 (en
Inventor
Tapani Ritoniemi
Teppo Karema
Hannu Tenhunen
Original Assignee
Tapani Ritoniemi
Teppo Karema
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 Tapani Ritoniemi, Teppo Karema filed Critical Tapani Ritoniemi
Priority to FI920379A priority Critical patent/FI92533C/en
Publication of FI920379A0 publication Critical patent/FI920379A0/en
Publication of FI920379A publication Critical patent/FI920379A/en
Application granted granted Critical
Publication of FI92533B publication Critical patent/FI92533B/en
Publication of FI92533C publication Critical patent/FI92533C/en

Links

Landscapes

  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

The invention concerns a sigma-delta modulator system with two cascade-connected modulators. The quantizing error of the first modulator and an error signal e representing integrated signal estimate error are taken to the second modulator for quantizing, the quantized error signal is derived and subtracted suitably from the delayed output signal of the first modulator. To reduce the noise the quantizing in the second modulator is a negative reconnection of the output power from at least one integration stage 42 to the input of a preceding integration stage 41, and the reconnection loop has at least one delay. <IMAGE>
FI920379A 1992-01-28 1992-01-28 Sigma-delta modulator FI92533C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI920379A FI92533C (en) 1992-01-28 1992-01-28 Sigma-delta modulator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI920379 1992-01-28
FI920379A FI92533C (en) 1992-01-28 1992-01-28 Sigma-delta modulator

Publications (4)

Publication Number Publication Date
FI920379A0 FI920379A0 (en) 1992-01-28
FI920379A true FI920379A (en) 1993-07-29
FI92533B FI92533B (en) 1994-08-15
FI92533C FI92533C (en) 1994-11-25

Family

ID=8534276

Family Applications (1)

Application Number Title Priority Date Filing Date
FI920379A FI92533C (en) 1992-01-28 1992-01-28 Sigma-delta modulator

Country Status (1)

Country Link
FI (1) FI92533C (en)

Also Published As

Publication number Publication date
FI92533C (en) 1994-11-25
FI92533B (en) 1994-08-15
FI920379A0 (en) 1992-01-28

Similar Documents

Publication Publication Date Title
ES2125961T3 (en) ANALOG-TO-DIGITAL CONVERTER WITH A MODULATED ACTIVATION SIGNAL.
EP0756384A3 (en) A method of improving the stability of a sigma-delta modulator employing dither
EP0887937A3 (en) Analogue and digital convertors
NO921766L (en) MODE CONVERTER
ATE176842T1 (en) DEVICE FOR CODING DIGITAL IMAGE-REPRESENTING SIGNALS AND CORRESPONDING DECODING DEVICE
FR2533382B1 (en) DELTA-SIGMA, DOUBLE INTEGRATION ENCODER AND APPLICATIONS OF THIS ENCODER TO A MIC TYPE TRANSMISSION CHANNEL AND TO THE MEASUREMENT OF CONTINUOUS VOLTAGES
CA2202538A1 (en) Time compression/expansion without pitch change
FI885156A0 (en) FOERFARANDE FOER KASKADKOPPLING AV TVAO ELLER FLERA SIGMA-DELTAMODULATORER SAMT ETT SIGMA-DELTA-MODULATORSYSTEM.
KR870010696A (en) Encoding Devices and Analog-to-Digital and Digital-to-Analog Converters Having the Same
EP0494738A3 (en) A sigma-delta modulator for a D/A converter with dither signal
GB0110340D0 (en) A signal processing circuit
KR970072711A (en) 1-Bit A / D Converter Reduces Noise Components
FI920379A (en) Sigma-delta modulator
DK0814635T3 (en) Hearing aid
EP0866554A3 (en) Signal processors
EP0845868A3 (en) Signal processors
AU561497B2 (en) Differential pcm transmission
EP0131261A3 (en) A convolution processor
HK1093123A1 (en) Integrated circuit containing a delta-sigma modulator with two-step quantization
JPS57155789A (en) Semiconductor laser modulator
GB2266017B (en) Analogue-to-digital converters
FR2160030A5 (en)
DE3783786D1 (en) CIRCUIT FOR DIGITAL COMPENSATION OF A DETERMINED NOISE SIGNAL.
WO2000014883A3 (en) Differential input circuit for digital signal processing system
TW269077B (en) Modulator

Legal Events

Date Code Title Description
BB Publication of examined application