Extremely simple constant-gm technique for low voltage rail-to-rail amplifier input stage

2011 ◽  
Author(s):  
Boram Lee ◽  
Ted Higman
Keyword(s):  
Low Voltage ◽  
Input Stage ◽  
Amplifier Input ◽  
Rail To Rail

scholarly journals A 0.3 V Rail-to-Rail Ultra-Low-Power OTA with Improved Bandwidth and Slew Rate

2021 ◽  
Vol 11 (2) ◽  
pp. 19
Author(s):  
Francesco Centurelli ◽  
Riccardo Della Sala ◽  
Pietro Monsurrò ◽  
Giuseppe Scotti ◽  
Alessandro Trifiletti
Keyword(s):  
Low Power ◽  
Low Voltage ◽  
Supply Voltage ◽  
Cmos Process ◽  
Slew Rate ◽  
Large Signal ◽  
Output Stage ◽  
Ultra Low Power ◽  
Input Stage ◽  
Rail To Rail

In this paper, we present a novel operational transconductance amplifier (OTA) topology based on a dual-path body-driven input stage that exploits a body-driven current mirror-active load and targets ultra-low-power (ULP) and ultra-low-voltage (ULV) applications, such as IoT or biomedical devices. The proposed OTA exhibits only one high-impedance node, and can therefore be compensated at the output stage, thus not requiring Miller compensation. The input stage ensures rail-to-rail input common-mode range, whereas the gate-driven output stage ensures both a high open-loop gain and an enhanced slew rate. The proposed amplifier was designed in an STMicroelectronics 130 nm CMOS process with a nominal supply voltage of only 0.3 V, and it achieved very good values for both the small-signal and large-signal Figures of Merit. Extensive PVT (process, supply voltage, and temperature) and mismatch simulations are reported to prove the robustness of the proposed amplifier.

CMOS low-voltage operational amplifiers with constant-gm rail-to-rail input stage

1994 ◽  
Vol 5 (2) ◽  
pp. 135-146 ◽  
Author(s):  
Ron Hogervorst ◽  
Remco J. Wiegerink ◽  
Peter A. L. De Jong ◽  
Jeroen Fonderie ◽  
Roelof F. Wassenaar ◽  
...  
Keyword(s):  
Low Voltage ◽  
Operational Amplifiers ◽  
Input Stage ◽  
Rail To Rail

Bipolar rail-to-rail constant-gm input stage for low voltage applications

1996 ◽  
Vol 32 (16) ◽  
pp. 1467 ◽  
Author(s):  
F. Alesii ◽  
A. D'Amico ◽  
M. Faccio ◽  
G. Ferri ◽  
C. Poduti ◽  
...  
Keyword(s):  
Low Voltage ◽  
Input Stage ◽  
Rail To Rail

Simple rail-to-rail low-voltage constant-transconductance CMOS input stage in weak inversion

1993 ◽  
Vol 29 (12) ◽  
pp. 1145 ◽  
Author(s):  
J.H. Botma ◽  
R.F. Wassenaar ◽  
R.J. Wiegerink
Keyword(s):  
Low Voltage ◽  
Weak Inversion ◽  
Input Stage ◽  
Rail To Rail ◽  
Constant Transconductance
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