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Simple low-noise power supply for electrical transient measurements
1Xerox Research Centre of Canada, 2480 Dunwin Drive, Mississauga, Ontario, Canada.
The Review of Scientific Instruments
|November 1, 1979
Summary
A simple method rapidly applies large, quiet DC voltage for transient electrical measurements. This technique minimizes noise, enabling accurate current detection in carrier mobility studies.
Area of Science:
- Electrical Engineering
- Materials Science
- Physics
Background:
- Accurate transient electrical measurements are crucial for material characterization.
- Power supply noise can introduce significant errors in sensitive measurements.
- Capacitive loads present challenges in maintaining stable voltage during transient events.
Purpose of the Study:
- To present a simple and effective method for applying and maintaining a stable DC voltage across capacitive loads.
- To eliminate noise-induced currents that interfere with transient measurements.
- To improve the accuracy of measurements like carrier mobility determination.
Main Methods:
- A novel technique for rapid DC voltage application and stabilization.
- Minimization of capacitive currents originating from power supply noise.
- Application in nonrepetitive electrical transient measurements over microsecond to second timescales.
Main Results:
- Achieved a large, essentially noiseless DC voltage across a capacitive load.
- Successfully eliminated interfering capacitive currents due to power supply noise.
- Demonstrated minimal noise (comparable to Johnson noise) in a 10-ms transient current measurement.
Conclusions:
- The described method offers a simple solution for high-fidelity transient electrical measurements.
- It significantly enhances the accuracy of measurements such as carrier mobility.
- The technique is broadly applicable to various scientific and engineering fields requiring precise transient analysis.
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