Very‐low frequency capacitively coupled AC amplifier with a current feedback operational amplifier

Wideband, Current Feedback OPERATIONAL AMPLIFIER With Disable

The OPA681 sets a new level of performance for broadband current feedback op amps. Operating on a very low 6mA supply current, the OPA681 offers a slew rate and output power normally associated with a much higher supply current. A new output stage architecture delivers a high output current with minimal voltage headroom and crossover distortion. This gives exceptional single-supply operation. U...

Operational Amplifier AC Specifications and Applications

This application note defines the ac specifications of voltage feedback operational amplifiers (Op Amps). Directly following these definitions, related amplifier circuits are given where the ramifications of the particular specifications causes less than optimum circuit performance. This is then followed with appropriate circuit solutions.The companion application note for DC specifications alo...

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...

A CMOS current - mode operational amplifier

Feedback analysis of transimpedance operational amplifier circuits

The transimpedance or current feedback operational amplifier (CFB op-amp) is reviewed and compared to a conventional voltage mode op-amp using an analysis emphasizing the basic feedback characteristics of the circuit. With this approach the paradox of the constant bandwidth obtained from CFB op-amps is explained. It is demonstrated in a simple manner that the constant gain-bandwidth product of ...