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Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

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Nội dung chi tiết: Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)aland Computer Engineering University of Minnesota Minneapolis, MN. USARamesh IlarjaniDepartment of Electricaland Computer Engineering University of M

innesota Minneapolis. MN. USAISSN I872-082XISSN 2197-1854 (electronic)Analog Circuits and Signal ProcessingISBN 978-3-319-46626-2ISBN 978-3-319-46628- Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

6 (eBook)DOI 10.1007/978-3-319-46628-6Library of Congress Control Number: 2016952245<ồ springer International Publishing AG 2017This Springer imprint

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

is published by Springer Naturerile registered company is springer International Publishing AGrile registered company address is: Gewerbestrasse 11.63

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)zation. Although technology scaling is advantageous to digital circuits in terms of increased speed and lower power, analog circuits strongly suffer f

rom this trend. This is becoming a crucial bottle neck in the realization of a system on chip in scaled technology merging high-density digital parts Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

with high-performance analog interfaces. This is because scaled technologies reduce the output impedance (gain) and supply voltage which limits the dy

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

namic range (output swing). One way to mitigate the power supply restrictions is to move to current mode circuit design rather than voltage mode desig

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)gies. Inverter amplifiers are known to have better transconductance efficiency, better noise, and linearity performance. But inverters are prone to PV

T variations and have poor CMRR and PSRR. To circumvent the problem, we have proposed various biasing schemes for inverters like semi-constant current Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

biasing, constant current biasing, and constant gm biasing. Each biasing technique has its own advantages, like semi-constant current biasing allows

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

to select different PMOS and NMOS current. This feature allow for higher inherent inverter linearity. Similarly constant current and constant gm biasi

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)ile operating from a nominal power of 0.9 V and al output swing of 0.9 Vpp in TSMC 40nm general purpose process. Further, the measured third harmonic

distortion varies approximately by I l.5dB with 120° variation in temperature and 9dB with an 18% variation in supply voltage.IT1C linearity can be in Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

creased by increasing the loop gain and bandwidth in a negative feedback circuit or by increasing the over drive voltage in open loop architectures. H

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

owever both these techniques increases the noise contribution of the circuit. There exist a trade off between noise and linearity in analog circuits.

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)driver which is capable of amplifying the continuous time signal with a gain of 8 and sample ontothe input capacitor (I pF) of I lObit successive appr

oximation register (SAR) ADC is designed in TSMC 65 nm general purpose process. This exploits the non-linearity cancellation in current mirror and als Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

o allows for higher bandwidth operation by decoupling closed loop gain from the negative feedback loop. The noise from the out of band is filtered bef

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

ore sampling leading to low noise operation. The measured design operates at lOOMS/s and has an OlPy of 40dBm at the Nyquist rate, noise power spectra

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)erature variation of 120 °C.Non-linearity cancellation is exploited in designing two filters, an anti-alias filter and a continuously tunable channel

select filter. Traditional active RC filters are based on cascade of integrators. These create multiple low impedance nodes in the circuit which resul Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

ts in a higher noise. We propose a real low pass filter-based filter architecture rather than the traditional integrator-based approach. Further, the

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

entire filtering operation lakes place in current domain to circumvent the power supply limitations. This also facilitates the use of tunable non-line

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)citor as compensation capacitor for lower power. The anti-alias filter designed for 50 MHz bandwidth that is fabricated in IBM 65 nm process achieves

an 1IP3 of 33 dBm while consuming 1.56 mW from 1.2 V supply. The channel select filter is tunable from 34 to 314 MHz and is fabricated in TSMC 65 nm g Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

eneral purpose process. This filter achieves an OIP3 of 25.24dBm at the maximum frequency while drawing 4.2mA from1.1V supply. The measured intermodul

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

ation distortion varies by 5 dB across 120 °C variation in temperature and 6.5 dB across a 200mV variation in power supply. Further, this filter prese

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)ogies as they are based on device switching rather than amplifying circuits. But recent SAR ADCs that have good energy efficiency have had relatively

large input capacitance increasing the driver power. We present a 2X time interleaved (TI) SAR ADC which has the lowest input capacitance of 133fF in Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

literature. The sampling capacitor is separated from the capacitive digital to analog converter (DAC) array by performing the input and DAC reference

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

subtraction in the current domain rather than as done traditionally in charge domain. The proposed ADC is fabricated in TSMC’s 65 nm general purpose p

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)B) at Nyquist rate is 7.55 bit while using 1.55 mW power from 1 V supply.Minneapolis, MN. USARakesh Kumar PalaniRamesh HarjaniContents1Introduction...

...................................................... 1I. ITraditional Operational Transconductance........................ 41.2Differential Pair Ver Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

sus Inverter............................... 71.3Non Linearity Analysis.......................................... 91.4Noise Analysis...................

Inverter-based Circuit Design Techniques for Low Supply Voltages-Springer (2017)

.............................. 10

Rakesh Kumar Palani • Ramesh HarjaniInverter-based CircuitDesign Techniques for Low Supply VoltagesspringerRakesh Kumar Palani Department of Electrica