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Reduced Third Order Intermodulation Distortion Utilizing A Push-Pull Class C Vhf Transistorized Amplifier, Norman B. Mosher
Reduced Third Order Intermodulation Distortion Utilizing A Push-Pull Class C Vhf Transistorized Amplifier, Norman B. Mosher
Retrospective Theses and Dissertations
In a transistorized push-pull amplifier, third order intermodulation distortion was effectively reduced at VHF frequencies with an output power of two watt. The non-linear distortion of the amplifier is modeled using a power series. The resulting expression is used as the basis for choosing the push-pull configuration to reduce the third order intermodulation distortion. The amplifier was built and tested, and the experimental results compare favorably with the theoretical results. The level of the third order intermodulation distortion is found to be at least 30 dB below the interfering signal level.
Intermodulation Analysis Of Class C Transistorized Amplifiers With Applications To V.H.F. Amplifiers, Robert Hopkins Wollam
Intermodulation Analysis Of Class C Transistorized Amplifiers With Applications To V.H.F. Amplifiers, Robert Hopkins Wollam
Retrospective Theses and Dissertations
The paper discusses the theoretical analysis and the experimental work done to describe the cause of intermodulation distortion in class C transistorized amplifiers. A mathematical basis for the intermodulation was derived using a single frequency input and a second frequency introduced into the output of the amplifier. It was followed by experimental work performed to justify the theory. These experiments used both pulsed and sinusoidal drives as amplifier inputs. Also, a feedback method along with the transistor's operating point was shown to reduce the intermodulation distortion produced by the amplifier. Finally, a short discussion on the results and some of …