THIN-FILM HYBRID MICROCIRCUIT WIDE-BAND NOISE GENERATOR.
Research and development technical rept.,
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
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The knowledge and experience gained through previous fabrication and evaluation of thin-film components in the Electronic Components Laboratory is applied to an electronic circuit known as a wideband amplitude noise generator. The thin-film noise generator illustrates how thin-film hybrid microcircuits are produced and indicates some of the thin-film microcircuit techniques and capabilities available to ECOM personnel in-house. Relatively large value capacitors .01 microfarads and resistors 700 kiloohms are achieved, on a common substrate, through the use of thin-film techniques. High parameter stability for the passive components is possible with a temperature annealing process. The problem of low, non-destructive, breakdown voltages, inherent in large area capacitors with thin dielectric materials, is overcome by application of a voltage pulse to the capacitors. This voltage application serves to remove incipient points of low breakdown strength by virtue of the self-healing property of thin-film capacitors with aluminum electrodes. Finally, frequency changes in the relaxation oscillator with ambient temperature changes are predicted by means of developed equations. Author
- Electrical and Electronic Equipment
- Test Facilities, Equipment and Methods