voltage(reference(and(bandgap(circuits( - mixedsignal · „widlar“ bandgap(–(reference...
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![Page 1: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/1.jpg)
Voltage reference and bandgap circuits
![Page 2: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/2.jpg)
Basic blocks for voltage reference circuits
![Page 3: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/3.jpg)
Characteris8cs of bipolar transistors
![Page 4: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/4.jpg)
Temperature dependence of BJT characteris8cs
![Page 5: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/5.jpg)
Temperature dependence of ΔVBE
![Page 6: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/6.jpg)
Temperature-‐compensa8on of VBE voltage
![Page 7: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/7.jpg)
Temperature-‐constant Reference Voltage: “Bandgap-‐Reference”
![Page 8: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/8.jpg)
Opera8on of Bandgap-‐Reference Circuit
![Page 9: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/9.jpg)
Bandgap-‐Reference Circuit
![Page 10: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/10.jpg)
Gummel plot of BJT
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Startup-‐Problem of Bandgap-‐Reference Circuit
![Page 12: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/12.jpg)
Adjustment of bandgap reference voltage
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Undervoltage detec8on circuit based on the bandgap reference principle
![Page 14: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/14.jpg)
Undervoltage detec8on circuit
![Page 15: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/15.jpg)
CMOS Compa8ble Bandgap Reference
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Bandgap reference with all npn-‐collectors connected to VDD
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Bandgap reference in a n-‐well CMOS technology
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„Widlar“ Bandgap – Reference
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Current -‐ Reference based on ΔVBE
![Page 20: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/20.jpg)
Cross-‐coupled current source based on ΔVBE
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Adjustable Z-‐diode
![Page 22: Voltage(reference(and(bandgap(circuits( - MiXeDsIgNaL · „Widlar“ Bandgap(–(Reference (Current(=(Reference(basedon ΔV BE. Crosscoupled (currentsource( basedon ΔV BE. Adjustable(Zdiode](https://reader035.vdocuments.pub/reader035/viewer/2022070707/5ea2db47a8aaf856790ca541/html5/thumbnails/22.jpg)
Z-‐diode voltage mul8plier