A current to voltage converter for cryogenics using a CMOS operational amplifier

A current to voltage converter for cryogenics using a CMOS operational amplifier

We have constructed a versatile current to voltage (I-V ) converter operating at liquid helium temperature, using a commercially available all-CMOS OPamp. It is valuable for cryogenic measurements of electrical current of nano-pico amperes, for example, in scanning probe microscopy. The I-V converter is thermally linked to liquid helium bath and self-heated up to 10.7 K. We have confirmed its c...

High-Performance CMOS Current Mirrors: Application to Linear Voltage-to-Current Converter Used for Two-Stage Operational Amplifier

This paper presents two schemes of high performance CMOS current mirror, one of them is used for operational transconductance amplifier (OTA) in analog VLSI systems. The linearity, output impedance, bandwidth and accuracy are the most parameters to determine the performance of the current mirror. Here a comparison of two architectures based on same architecture of the amplifier is presented. Th...

A CMOS current - mode operational amplifier

Low-Voltage CMOS Current Feedback Operational Amplifier and Its Application

ETRI Journal, Volume 29, Number 2, April 2007 A novel low-voltage CMOS current feedback operational amplifier (CFOA) is presented. This realization nearly allows rail-to-rail input/output operations. Also, it provides high driving current capabilities. The CFOA operates at supply voltages of ±0.75 V with a total standby current of 304 μA. The circuit exhibits a bandwidth better than 120 MHz and...

Design of a High Frequency Low Voltage CMOS Operational Amplifier

This paper presented a method for the design of a high frequency CMOS operational amplifier. The OPAMP is designed using tsmc 0.18 micron CMOS technology which operates at 2.5V power supply. This is a two stage CMOS OPAMP which employs a miller capacitor. To design a two stage OPAMP is a multi-dimensional optimization problem where optimization of one or more parameters may easily result into d...