Computer Science – Performance
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ijssc..10...19c&link_type=abstract
IEEE Journal of Solid-State Circuits, vol. SC-10, Feb. 1975, p. 19-27. Australian Research Grants Committee
Computer Science
Performance
1
Integrators, Microwave Amplifiers, Operational Amplifiers, Time Lag, Time Measurement, Transistor Amplifiers, Amplifier Design, Bandwidth, Equivalent Circuits, Performance Prediction, Power Gain, Signal Measurement, Transfer Functions, Ultrahigh Frequencies
Scientific paper
A simple low frequency technique for the measurement of subnanosecond delay times with an operational amplifier connected as a summing integrator is described. Previous integrator theory is extended to incorporate second-order effects. The operational amplifier gain-bandwidth product is shown to set a limit to the sensitivity of the integrator. For a gain-bandwidth product of 1 GHz the smallest measurable delay time is estimated to be about 5 ps, which is small enough for measurements on the fastest microwave transistors. Expressions for the delay times of transistors are derived from the hybrid-pi model. Examples of measured delay times of microwave transistors are given and the results are compared with theoretical predictions.
Cohen Doron
Zakarevicius R. A.
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