Bias Supply For Microwave Preamps

Posted on Mar 6, 2013

These two circuits provide bias for the microwave preamps shown in this text. The circuit in Fig. 51-5(a)

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is a simple passive supply. Figures 51-5(b) and 51-5(c) are active supplies, with Ul generating a negative supply and Ql setting the drain voltage and current, independent of GASFET characteristics.

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