TY - GEN
T1 - A 69MHz-Bandwidth 40V/μs-Slew-rate 3nV/√Hz-Noises 4.5μV-Offset Chopper Operational Amplifier
AU - Koolivand, Yarallah
AU - Rezayean, Yasser
AU - Zamani, Milad
AU - Akbari, Meysam
AU - Shoaei, Omid
AU - Tang, Kea Tiong
AU - Moradi, Farshad
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Sound Navigation and Ranging (SONAR) are widely deployed in marine applications, locating submarines, underwater research, weather forecasting, oil and gas exploration, and medical fields. There are three types of SONAR: passive, active, and recently hybrid SONARs. Passive SONAR deals with weak signals at low frequencies (<10kHz), demanding low offset and low flicker noise amplifiers, while active SONAR works at higher frequencies (up to MHz), calling for low thermal noise and wide UGBW amplifiers. Hybrid SONAR covers both low and high-frequency bandwidth, and its amplifier requires all mentioned features. Although the chopping technique is a remedy to reduce the flicker noise in multi-stage amplifiers, the input bias current and the residue offset are proportional to the chopping frequency, f_ch. Fuithermore, increasing f_ch demands for increasing UGBW and power consumption of the amplifier rarely exceed a few hundred kHz and limits its highfrequency applications [1, 2]. This paper proposes an OpAmp with 69MHz UGBW, 40V/us SR at 100pF load cap, 3nV/Hz input referred thermal noise PSD, lower than 4.5μV offset voltage, and only 1. 5nA input current at 2. 5MHzf_ch, while the circuit draws 3. 3mA from 1. 8V. This is made possible by introducing a new compensation scheme, modified biasing circuitry for the rail-rail input g_m stage, and presenting low input current bootstrap switches.
AB - Sound Navigation and Ranging (SONAR) are widely deployed in marine applications, locating submarines, underwater research, weather forecasting, oil and gas exploration, and medical fields. There are three types of SONAR: passive, active, and recently hybrid SONARs. Passive SONAR deals with weak signals at low frequencies (<10kHz), demanding low offset and low flicker noise amplifiers, while active SONAR works at higher frequencies (up to MHz), calling for low thermal noise and wide UGBW amplifiers. Hybrid SONAR covers both low and high-frequency bandwidth, and its amplifier requires all mentioned features. Although the chopping technique is a remedy to reduce the flicker noise in multi-stage amplifiers, the input bias current and the residue offset are proportional to the chopping frequency, f_ch. Fuithermore, increasing f_ch demands for increasing UGBW and power consumption of the amplifier rarely exceed a few hundred kHz and limits its highfrequency applications [1, 2]. This paper proposes an OpAmp with 69MHz UGBW, 40V/us SR at 100pF load cap, 3nV/Hz input referred thermal noise PSD, lower than 4.5μV offset voltage, and only 1. 5nA input current at 2. 5MHzf_ch, while the circuit draws 3. 3mA from 1. 8V. This is made possible by introducing a new compensation scheme, modified biasing circuitry for the rail-rail input g_m stage, and presenting low input current bootstrap switches.
U2 - 10.1109/CICC57935.2023.10121273
DO - 10.1109/CICC57935.2023.10121273
M3 - Article in proceedings
AN - SCOPUS:85160017755
T3 - Proceedings of the Custom Integrated Circuits Conference
BT - 2023 IEEE Custom Integrated Circuits Conference (CICC)
PB - IEEE
CY - New York
T2 - 44th Annual IEEE Custom Integrated Circuits Conference, CICC 2023
Y2 - 23 April 2023 through 26 April 2023
ER -