Accession Number : AD0810399

Title :   PREFERRED CIRCUIT TECHNIQUES FOR TRANSISTOR AMPLIFIERS.

Descriptive Note : Interim rept. no. 7,

Corporate Author : AIRBORNE INSTRUMENTS LAB DEER PARK NY

Personal Author(s) : Kornfeld, David ; Dauksher, Walter ; Greenspan, Myron ; Kanischak, Gerald

Report Date : FEB 1967

Pagination or Media Count : 204

Abstract : This report describes an investigation of circuit techniques to minimize spurious responses in transistor amplifiers. An investigation was conducted of both bipolar transistor amplifiers and field-effect transistor amplifiers. For bipolar transistor amplifiers, equations were derived which predict harmonic generation, intermodulation, and cross-modulation. These equations include dependence upon circuit configuration (common emitter, common base, and common collector), load resistance, source resistance, frequency, feedback, cascading, and bias current and voltage. Extensive measurements verify the validity of the equations with good correlation under nearly all conditions for several transistors (2N2857, 2N3137, 2N3553, 2N3995, TIXS40). For field-effect transistor (FET) amplifiers, the nonlinear characteristics were determined by measurements of several FET's (K1201, K1003, 2N3823, TIXS35). It was shown that a simple graphical analysis can be used to determine the bias conditions for which the nonlinear effects are minimized. The measurements indicate that the FET is probably better than the bipolar transistor for equal transistor dissipation. Since present FET's do not have the dissipation capabilities of bipolar transistors, they are likely to be out-performed by bipolar transistors with higher dissipation capabilities. (Author)

Descriptors :   *RESPONSE(BIOLOGY)), (*TRANSISTOR AMPLIFIERS, (*FIELD EFFECT TRANSISTORS, TRANSISTOR AMPLIFIERS), (*MICROWAVE AMPLIFIERS, TRANSISTOR AMPLIFIERS), TRANSIENTS, EQUATIONS, MATHEMATICAL PREDICTION, ELECTRICAL RESISTANCE, FEEDBACK, ELECTRIC CURRENTS, VOLTAGE, GRAPHICS, DISTORTION.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE