KR970031370A

KR970031370A - Higher-Order Noise-Formed Modulator Using Sigma-Delta Modulation

Info

Publication number: KR970031370A
Application number: KR1019950040093A
Authority: KR
Inventors: 박재진; 이성호
Original assignee: 김광호; 삼성전자 주식회사
Priority date: 1995-11-07
Filing date: 1995-11-07
Publication date: 1997-06-26
Also published as: KR0182034B1

Abstract

이 발명은 시그마-델타 변조를 이용한 고차 잡음 정형 변조기에 관한 것으로, 디지탈 신호를 입력받아 시그마-델타 변조에 의해 잡음을 정형하여 출력하는 제1변조부(60)와, 상기 제1변조부(60)에서 출력되는 신호에서 잡음성분을 추출하여 출력하는 뺄셈기(70)와, 상기 뺄셈기(70)로부터 출력되는 잡음 성분 신호를 입력받아 시그마-델타 변조에 의한 잡음 정형하고 양자화 잡음을 제거하는 양자화 잡음 제거부(80)와, 상기 제1변조부(60)로부터 출력되는 신호와 양자화 잡음 제거부(80)로부터 출력되는 신호를 입력받아 더하여 출력하는 덧셈기(90)로 이루어져 있으며, 디지탈 신호를 아날로그 신호로 변환시키거나, 반대로 아날로그 신호를 디지탈 신호로 변환시키는 경우에 발생하는 잡음을 제거하는 데에 있어서, 잡음 정형 구조를 다단계로 구성함으로써, 최종 출력의 비트수를 줄이고, 후단의 필터링 차수를 감소시켜 고차 구조로의 확장이 가능하며, 회로의 크기를 줄일 수 있는 시그마-델타 변조를 이용한 고차 잡음 정형 변조기에 관한 것이다.The present invention relates to a higher-order noise shaping modulator using sigma-delta modulation, comprising: a first modulator (60) for receiving a digital signal and shaping and outputting noise by sigma-delta modulation; and the first modulator (60). A subtractor 70 for extracting and outputting a noise component from the signal output from the signal) and a quantization for shaping noise by sigma-delta modulation and removing quantization noise from the noise component signal output from the subtractor 70. The noise canceller 80 and the adder 90 receives the signal output from the first modulator 60 and the signal output from the quantization noise canceller 80, and adds the output signal to the digital signal. In order to eliminate noise generated when converting to a signal or conversely, converting an analog signal to a digital signal, the noise shaping structure is configured in multiple stages. The present invention relates to a higher-order noise shaping modulator using sigma-delta modulation that reduces the number of bits of a longitudinal output, reduces the filtering order at the rear end, and expands to a higher order structure.

Description

Higher-Order Noise-Formed Modulator Using Sigma-Delta Modulation

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 이 발명의 제1실시예에 따른 시그마-델타 변조를 이용한 고차 잡음 정형 정형 변조기를 적용한 블럭도이고,3 is a block diagram of a high-order noise shaping modulator using sigma-delta modulation according to the first embodiment of the present invention.

제4도는 이 발명의 제2실시예에 따른 시그마-델타 변조를 이용한 고차 잡음 변조기를 적용한 블럭도이다.4 is a block diagram of a high-order noise modulator using sigma-delta modulation according to a second embodiment of the present invention.

Claims

First modulation means for receiving a digital signal and shaping and outputting noise by sigma-delta modulation; Noise extraction means for extracting the noise component from the signal output from the first modulation means and outputting: A quantization to receive the noise component signal output from the noise extraction means to form a noise by sigma-delta modulation and to remove the quantization noise Noise removing means; And a signal completion means for receiving and outputting the signal output from the first modulating means and the signal output from the quantization noise removing means.

2. The structure of claim 1, wherein the first modulator comprises a first delay unit DY61 for delaying and outputting a signal processed by the first modulator immediately before being delayed and a digital signal X. A subtractor DF62 for subtracting and outputting the signal fed back from the first delay unit DY61, an integrator 65 for integrating and outputting a signal output from the subtractor DF62, and the integrator 65; A high-order noise type modulator using sigma-delta modulation, characterized in that it comprises a quantizer (Q66) for quantizing and outputting the signal output from the.

The adder (AD65) according to claim 2, wherein the integrator (65) includes an adder (AD65) for adding the signal output from the subtractor (DF62) and a feedback signal to the quantizer (Q66), and the adder (AD65). And a second delay unit (DY65) which feeds back the signal outputted from the signal), delays it, and outputs the delayed signal to the spacer AD65.

2. The structure of claim 1, wherein the first modulator comprises a first delay unit (DY101) and a digital signal (X) for delaying and outputting a signal rule processed by the first modulator. A first adder ADl02 for adding and outputting a signal fed back from the first delay unit DYl01, a first integrator 103 for integrating and outputting a signal output from the first adder ADl02, and the first Integrates the third adder (AD104) and the signal output from the third adder (AD104) by receiving the signal output from the first integrator 103, and adds and outputs the signal output from the first delay unit (DY101) A high order noise shaping modulator using sigma-delta modulation, comprising a second integrator 105 for outputting and a quantizer Q106 for receiving a signal output from the second integrator 105 and quantizing and outputting the signal. .

The second adder (AD103) according to claim 4, wherein the first integrator (103) is configured to add a signal output from the first adder (AD102) and a feedback signal and output the result to the third adder (AD101). And a second delay unit DYl03 which feeds back the signal output from the second adder AD103, delays it, and outputs it to the second adder AD103. Noise shaping modulator.

5. The configuration of the second integrator 105 includes: a fourth adder AD105 which adds a signal output from the third adder AD104 and a feedback signal and outputs the same to the quantizer Q106 And a third delay unit DYl05 which feeds back the signal output from the fourth adder AD105, delays it, and outputs the delay signal to the fourth adder AD105. Orthopedic modulator.

The method of claim 1, wherein the noise extracting means receives the output signal of the integrator 65 of the first modulating means, and subtracts and outputs the output signal of the quantizer Q66 of the first modulating means. Higher-Order Noise-Formed Modulator Using Sigma-Delta Modulation.

The method of claim 1, wherein the noise extracting means receives the output signal of the second integrator 105 of the first modulating means and subtracts and outputs the output signal of the quantizer Q106 of the first modulating means. A higher-order noise shaping modulator using sigma-delta modulation.

2. The structure of the first modulator according to claim 1, wherein the second modulator comprises a first delay unit (DY81) for delaying and outputting a signal processed by the second modulator immediately before the delay, and the first delay unit (DY81). A differentiator 82 for differentiating and outputting a signal output from the second output unit, a second subtractor DF83 for receiving a signal output from the noise extracting means and subtracting the signal output from the differentiator 82 and outputting the subtractor; An integrator 85 that integrates and outputs a signal output from the second subtractor DF83 and a third subtractor that outputs a signal output from the integrator 82 by receiving a signal output from the integrator 85 And a subtractor (DF86) and a quantizer (Q87) for quantizing and outputting a signal output from the third subtractor (DF86).

10. The apparatus of claim 9, wherein the differentiator 82 comprises: a second delay unit DY82 for receiving a signal output from the first delay unit DY81 and delaying and outputting the signal again; High order noise using sigma-delta modulation, comprising a first subtractor DF82 that receives a signal output from the device DY81 and subtracts the signal output from the second delayer DY82. Orthopedic modulator.

The adder (AD85) of claim 9, wherein the integrator (85) comprises: an adder (AD85) for adding a signal output from the second subtractor (DF83) and a feedback signal and outputting the signal to the third subtractor (DF86); And a third delayer (DY85) for feeding back the signal output from the adder (AD85), delaying the signal, and outputting the delayed signal to the adder (AD85).

2. The apparatus of claim 1, wherein the configuration of the quantization noise removing means includes: a first delay unit DY301 for delaying and outputting a signal processed by the quantization noise removing unit immediately before, and the first delay unit DY301; A first integrator 302 for integrating and outputting a signal output from the second integrator, a second integrator 303 for integrating and outputting a signal output from the first integrator 302, and a signal output from the noise extracting means A first subtractor DF304 that receives an input and subtracts a signal output from the second integrator 303, and receives a signal output from the first subtractor DF304 from the first integrator 302 Sigma characterized in that it comprises a second subtractor (DF305) for subtracting and outputting the output signal, and a quantizer (Q306) for receiving the signal output from the second subtractor (DF305) and quantize and output the signal. Higher Order Using Delta Modulation Noise shaping modulator.

The method of claim 12, wherein the configuration of the first integrator 302, the second delay unit (DY302) for receiving the signal output from the first delay unit (DY301) and delaying and outputting the signal again; Higher-order noise using sigma-delta modulation, comprising a first adder AD302 which receives a signal output from the first delay unit DY301 and adds the signal output from the second delay unit DY302 to output the signal. Orthopedic modulator.

. 13. The configuration of the second integrator 303 includes: a third delay unit DY303 for delaying and outputting a signal output from the first integrator 302, and the first integrator 302 from the first integrator 302; And a second adder (AD303) for receiving the output signal and adding the signal output from the third delay unit (DY303).

※ Note: The disclosure is based on the initial application.