The current-feedback amplifier (CFA) started to gain wide exposure some three decades ago, when it became available in integrated-circuit form from Comlinear, Elantec, and Analog Devices. Since then, ...
Although the ubiquitous LM386 IC was designed to be used as an audio amplifier, it has a number of undocumented characteristics that can be exploited to create simple radio receiver circuits that ...
The circuit in Figure 1 sinks a constant current (ICE3) through Q3’s collector and emitter. This design is balanced so changes in Q3’s base-emitter voltage (VBE) don’t affect the current sink’s ...
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