Title :
A Wide-Band Transconductance Amplifier for Current Calibrations
Abstract :
A wide-band transconductance amplifier for current calibrations is described. The amplifier will deliver a ground-referenced constant current of 5 A rms from dc to over 100 kHz. Its stable magnitude and phase permit it to be used in precise power calibration systems to provide the current component of a phantom power source. The amplifier also provides a ground-referenced voltage output of 1 V/A for monitoring the magnitude and phase of the output current.
Keywords :
Broadband amplifiers; Calibration; Circuits; Differential amplifiers; Imaging phantoms; Monitoring; NIST; Resistors; Transconductance; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1985.4315425
