A Thick-Film Television Video IF Amplifier Using Compatible Components

This paper describes development of a Thick-Film Television Video IF Amplifier Module. Discrete high-Q components compatible with thick-film techniques have been developed at Texas Instruments Incorporated. Their effectiveness as adjustable reactive elements has been successfully demonstrated by incorporating them in hybrid modules and using them as frequency selective elements in a commercial television receiver. Adequate tuning control has been achieved using airbrasive techniques to remove core material from toroidal transformers and to decrease the conductive surface area of flip-chip capacitors. Considerable attention is devoted to selection of magnetic and dielectric materials and to the shape and size of components consistent with adequate volumetric effi-efficiency. Suggestions in connection with automatic alignment procedures which circumvent the need for conventional slug adjustment and observation are also included.