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Analog Filters
Apinunt Thanachayanont
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Filters
2010Mixed-signal ICs Design, A. Thanachayanont2
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Types of filters
2010Mixed-signal ICs Design, A. Thanachayanont3
Lowpass
Highpass
Bandpass
Band-reject
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Second-order filters (biquadratic function)
2010Mixed-signal ICs Design, A. Thanachayanont4
![Page 5: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/5.jpg)
Second-order LPF
2010Mixed-signal ICs Design, A. Thanachayanont5
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Second-order HPF
2010Mixed-signal ICs Design, A. Thanachayanont6
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Second-order BPF
2010Mixed-signal ICs Design, A. Thanachayanont7
![Page 8: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/8.jpg)
Second-order BRF
2010Mixed-signal ICs Design, A. Thanachayanont8
![Page 9: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/9.jpg)
Second-order all-pass filter (APF)
2010Mixed-signal ICs Design, A. Thanachayanont9
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Active-RC filters
� C integrator
2010Mixed-signal ICs Design, A. Thanachayanont10
![Page 11: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/11.jpg)
Active-RC inverting integrator
2010Mixed-signal ICs Design, A. Thanachayanont11
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Non-inverting integrator
2010Mixed-signal ICs Design, A. Thanachayanont12
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1st-order filter
2010Mixed-signal ICs Design, A. Thanachayanont13
![Page 14: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/14.jpg)
Single amplifier 2nd-order filter – Sallen-
Key LP biquad filter
2010Mixed-signal ICs Design, A. Thanachayanont14
![Page 15: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/15.jpg)
Single amplifier 2nd-order filter – Sallen-
Key LP biquad filter
2010Mixed-signal ICs Design, A. Thanachayanont15
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Single amplifier 2nd-order filter – Sallen-
Key LP biquad filter
2010Mixed-signal ICs Design, A. Thanachayanont16
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State-variable 2nd-order filters
2010Mixed-signal ICs Design, A. Thanachayanont17
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Tow-Thomas (TT) biquad
2010Mixed-signal ICs Design, A. Thanachayanont18
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Arbitrary transmission zeros by
summing
2010Mixed-signal ICs Design, A. Thanachayanont19
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MOSFET-C filters
� MOSFET in the Triode region
� MOSFET-C integrators
2010Mixed-signal ICs Design, A. Thanachayanont20
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MOSFET-C TT biquad filter
2010Mixed-signal ICs Design, A. Thanachayanont21
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Transconductor-C filters
� Transconductor
2010Mixed-signal ICs Design, A. Thanachayanont22
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Transconductor basic circuits
2010Mixed-signal ICs Design, A. Thanachayanont23
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Gm-C lossy integrator
2010Mixed-signal ICs Design, A. Thanachayanont24
![Page 25: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/25.jpg)
Fully-differential Gm-C integrator
2010Mixed-signal ICs Design, A. Thanachayanont25
![Page 26: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/26.jpg)
Gm-C-opamp integrator
2010Mixed-signal ICs Design, A. Thanachayanont26
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Gyrators
2010Mixed-signal ICs Design, A. Thanachayanont27
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Gm-C gyrators
2010Mixed-signal ICs Design, A. Thanachayanont28
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CMOS transconductors
2010Mixed-signal ICs Design, A. Thanachayanont29
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Transconductor’s non-idealities
2010Mixed-signal ICs Design, A. Thanachayanont30
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Effects of non-zero go on gyrator
2010Mixed-signal ICs Design, A. Thanachayanont31
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Effect of phase shift on gyrator
2010Mixed-signal ICs Design, A. Thanachayanont32
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Gm-C 1st-order filter
2010Mixed-signal ICs Design, A. Thanachayanont33
![Page 34: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/34.jpg)
Gm-C 2nd-order filters
2010Mixed-signal ICs Design, A. Thanachayanont34
![Page 35: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/35.jpg)
2010Mixed-signal ICs Design, A. Thanachayanont35
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Gm-C 1st-order filter using Miller
integrators
2010Mixed-signal ICs Design, A. Thanachayanont36
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Gm-C 1st-order filter using Miller
integrators
2010Mixed-signal ICs Design, A. Thanachayanont37
![Page 38: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/38.jpg)
Gm-C 2nd -order filter using Miller
integrators
2010Mixed-signal ICs Design, A. Thanachayanont38
![Page 39: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/39.jpg)
Gm-C 2nd -order filter using Miller
integrators
2010Mixed-signal ICs Design, A. Thanachayanont39
![Page 40: HO8 1 filter - Apinunt KMITLapinunt.yolasite.com/resources/Mixed-IC/HO8_1_filter.pdf · Single amplifier 2 nd-order filter –Sallen-Key LP biquad filter 14 Mixed-signal ICs Design,](https://reader030.vdocument.in/reader030/viewer/2022020303/5b3ce0937f8b9a28308b9cb6/html5/thumbnails/40.jpg)
Ladder filter using Gm-C gyrators
2010Mixed-signal ICs Design, A. Thanachayanont40
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Ladder filter using Signal-Flow Graph
2010Mixed-signal ICs Design, A. Thanachayanont41
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Gm-C resonator
2010Mixed-signal ICs Design, A. Thanachayanont42
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Gm-C oscillator
2010Mixed-signal ICs Design, A. Thanachayanont43