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Consumer Electronics by S. P. Bali

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PRACTICAL FM TUNER CIRCUITS

1. FM Tuner Using BF200 Silicon Planar Transistors: High quality FM reception calls for a tuner having a low noise factor and excellent signal handling ability. These objectives can be achieved by exploiting the inherently good signal-handling capability of the BF200 in a circuit configuration favouring optimum noise performance.

This high-performance tuner uses a tuned aerial circuit matched to the r.f. transistor by a fixed inductance.

By this means it is possible to retain the benefits of a low-loss selective aerial circuit, which can be approximately power matched, and, through an impedance transform, to allow the transistor to be matched for optimum noise performance. The transistor is then required to handle ...

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