Low Cost, High Performance Transistor Television Receivers

Economic premiums and performance ceilings have limited transistor uses in television receivers. Recent developments have yielded designs with full performance characteristics at cost levels comparable to tube sets. The paper describes innovations in tuner, IF, and AGC circuitry to achieve good sensitivity and strong signal handling. New detector circuits for both sound and picture give improved performance with lower cost. A different approach to the sweep circuit uses either transistor or GCS devices and provides a design freedom to match a variety of supply voltages to the volt-ampere rating of the semiconductor device. An improved noise inverter arrangement is also described.