The flipped voltage follower: a useful cell for low-voltage low-power circuit design

Carvajal, R.G.; Ramírez-Angulo, J.; Lopez-Martin, A.J.; Torralba, A.; Galán, J.; Carlosena, A.; Chavero, Fernando Muñoz

doi:10.1109/tcsi.2005.851387

Cited by 574 publications

(220 citation statements)

References 44 publications

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“…Note that Q1 provides shunt feedback and that QFVF and Q1 form a two pole negative feedback loop. The output impedance of the control transistor is minimized by the feedback loop [9]. Minimum possible low voltage supply required for flipped voltage follower is given by equation 6.…”

Section: Pmos Source Follower With Current Sourcementioning

confidence: 99%

Design and Analysis of Flipped Voltage Follower for Different Aspect Ratio

Gupta¹,

Mehra²,

Sharma³

2016

IJCA

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This paper identifies a conventional flipped voltage follower (FVF) for high performance, low-voltage and low-power applications. This basic circuit is used as a voltage buffer, impedance matching and a level shifter. It presents more suppleness in contrast to the basic voltage follower as dc voltage level can be amended by varying aspect ratio of the MOS transistors. However, gain of the flipped voltage follower can be altered by scaling the aspect ratio (W/L) ratio of the transistors. This circuit is an essential building block for the analog circuits as it replicates the input voltage and voltage accuracy is a vital factor for high performance circuits. In this paper, proposed circuit has been designed and simulated on 45nm channel length technology. Simulated results for varying aspect ratio, W/L of 1, 2 and 3 are shown in the results with the help of input and output voltage graphs. The output voltage comes to be 95%, 90% and 85% of input voltage for W/L ratio of 1, 2 and 3 respectively.

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Section: Pmos Source Follower With Current Sourcementioning

confidence: 99%

Design and Analysis of Flipped Voltage Follower for Different Aspect Ratio

Gupta¹,

Mehra²,

Sharma³

2016

IJCA

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“…As mentioned previously, the WTA follows the input signal with the dominant voltage level, thus the proposed circuit is based on a high performance voltage follower denominated Flipped Voltage Follower (FVF) [2], and shown in Fig. 1 b.…”

Section: Symmetric Differential Voltage Follower As Wtamentioning

confidence: 99%

“…Note that the minimum supply requirement is that of two gate-source voltages and a drain-source saturation voltage. [2], and c) proposed symmetrical differential FVF (SDFVF).…”

Section: Introductionmentioning

confidence: 99%

Low-voltage differential voltage follower for WTA and fully differential applications

Padilla-Cantoya

Furth

Molinar-Solís

et al. 2012

IEICE Electron. Express

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A low-voltage differential version of a high performance voltage follower is presented. The proposed circuit is very compact, and symmetric with respect to the input devices. Both differential input devices are enhanced by local shunt feedback, increasing the gain and, thus, reducing the output resistance for higher precision. The circuit has proved useful as a winner-take-all (WTA) circuit. It also features operation as a fully differential amplifier with low supply voltage requirements close to a transistor's threshold voltage. Experimental results verifying the operation of the proposed structure are provided.

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“…In order to preserve high precision of the ladders, the buffer was designed to have very low input resistance. The flipped follower configuration [16] was chosen as the input stage of the buffer, because it can have input resistance as small as 10-20 Ω due to an internal negative feedback. The output buffer comprising two identical followers (transistors M 1a(b) -M 3a(b) ) and an additional output stage (M 1c -M 3c ) is shown in Fig.…”

Section: Analogue Processormentioning

confidence: 99%

CMOS realisation of analogue processor for early vision processing

Jendernalik¹,

Jakusz²,

Blakiewicz³

et al. 2011

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The architecture concept of a high-speed low-power analogue vision chip, which performs low-level real-time image algorithms is presented. The proof-of-concept prototype vision chip containing 32 × 32 photosensor array and 32 analogue processors is fabricated using a 0.35 µm CMOS technology. The prototype can be configured to register and process images with very high speed, reaching 2000 frames per second, or achieve very low power consumption, several µW. Finally, the experimental results are presented and discussed.

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The flipped voltage follower: a useful cell for low-voltage low-power circuit design

Cited by 574 publications

References 44 publications

Design and Analysis of Flipped Voltage Follower for Different Aspect Ratio

Design and Analysis of Flipped Voltage Follower for Different Aspect Ratio

Low-voltage differential voltage follower for WTA and fully differential applications

CMOS realisation of analogue processor for early vision processing

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