SMALL SIGNAL SEMICONDUCTOR COMPOSITES.
Final rept. for 1 Jul 63-30 Jun 64,
MOTOROLA INC PHOENIX ARIZ SEMICONDUCTOR PRODUCTS DIV
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The steps taken in the design, evaluation and fabrication of linear integrated circuits which have performance similar to circuits utilized in manpack communications gear are listed. Specifically, four circuits were developed and fabricated A IF amplifier. A low power drain stage capable of 20 db cascaded power gain at 455 kc. B Limiter. A low power drain stage with sufficient power output at 455 kc to drive a discriminator. C Squelch. A low power drain stage with the capability of suppressing audio output by 50 db. D Audio. A circuit with low standby power drain, 50 db power gain and 100 mw audio output. As a demonstration vehicle for these integrated circuits, an interim integrated circuit receiver was designed utilizing the linear integrated circuits described for the receiver back end. For the r-f, mixer and oscillator functions, integrated circuits designed for other applcations were adapted. These front end circuits permit demonstration of the receiver, but introduce a very heavy power drain. The receiver was constructed using passive external components where necessary. Performance of the demonstration receiver meets or exceeds the specifications of the ANPRR-9 manpack radio. Author