Wide band transistor amplifiers with reduction in number of amplifying stages at higher frequencies
Abstract
Abstract A WIDE BAND RELATIVELY HIGH POWER LAW DISTORTION STABLE SIGNAL GENERATOR IS OPERATIVE OVER THE FREQUENCY RANGE 10 HZ. TO 10 MHZ. THE SYSTEM INCLUDES A NUMBER OF AMPLIFLYING STAGES THAT PROVIDE MULITIPLE STAGE AMPLIFICATION AT LOW FREQUENCIES AND SINGLE STAGE AMPLIFICATION EFFECTIVELY AT THE HIGHER FREQUENCIES TO HELP PREVENT UNDESIRED OSCILLATION. NONLINEAR FEEDBACK TECHNIQUES ARE EMPLOYED TO MAINTAIN AVC STABILITY. FEEDBACK FROM THE OUTPUT STAGE IS DERIVED SO THAT THE OUTPUT STAGE EMITTER RESISTORS FORM A PORTION OF THE 50 OHM OUTPUT IMPEDANCE. A NOVEL LADDER ATTENUATING NETWORK PROVIDES PRECISION ATTENUATION WHILE PRESENTING THE SAME 50 OHM IMPEDANCE AT ALL ATTENUATION LEVELS OVER THE FREQUENCY RANGE.
Inventors
- 👤 William C Kulas
Bibliographic Details
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