In this paper we introduce an improved standard-cell-based voltage amplifier cell with low output resistance. The proposed amplifier cell exhibits a voltage gain whose value can be accurately set by the number of paralleled inverters, and its output static voltage is well controlled through a replica bias approach. A three-stage fully synthesizable OTA architecture exploiting the improved voltage amplifier is also proposed. The OTA has been designed referring to the standard-cell library of a 180nm CMOS technology with a supply voltage of 0.3V and a nominal power consumption of only 6.63 nW, and exhibits a dc-gain of 73.5 dB with a gain-bandwidth-product of 9.63 kHz. A comparison against the state of the art of ultra-low-voltage OTAs has shown that the proposed amplifier exhibits the best value of the small signal figures of merit.
A Novel High Performance Standard-Cell Based ULV OTA Exploiting an Improved Basic Amplifier / Sala, Riccardo Della; Centurelli, Francesco; Scotti, Giuseppe. - In: IEEE ACCESS. - ISSN 2169-3536. - 12:(2024), pp. 17513-17521. [10.1109/access.2024.3359157]
A Novel High Performance Standard-Cell Based ULV OTA Exploiting an Improved Basic Amplifier
Sala, Riccardo Della;Centurelli, Francesco;Scotti, Giuseppe
2024
Abstract
In this paper we introduce an improved standard-cell-based voltage amplifier cell with low output resistance. The proposed amplifier cell exhibits a voltage gain whose value can be accurately set by the number of paralleled inverters, and its output static voltage is well controlled through a replica bias approach. A three-stage fully synthesizable OTA architecture exploiting the improved voltage amplifier is also proposed. The OTA has been designed referring to the standard-cell library of a 180nm CMOS technology with a supply voltage of 0.3V and a nominal power consumption of only 6.63 nW, and exhibits a dc-gain of 73.5 dB with a gain-bandwidth-product of 9.63 kHz. A comparison against the state of the art of ultra-low-voltage OTAs has shown that the proposed amplifier exhibits the best value of the small signal figures of merit.File | Dimensione | Formato | |
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