November 2007
Intermediate to advanced
736 pages
46h 32m
English
Content preview from Consumer Electronics
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ACTIVE TONE CONTROL
Figure 18.5 illustrates an active tone control circuit which employs a frequency-dependent feedback network between the collector and base of the transistor. For input voltages less than 250 mV the total distortion remains below 0.1%, rising to 0.85% for an output voltage of 2 V at 12,500 Hz. The input and output impedances at 1 kHz are 40 kΩ and 180 Ω respectively.
Fig. 18.5 Active tone control circuit
The range of control extends from –22 to +19 dB at 30 Hz, and from –19 to +19.5 dB at 20 kHz. The flat frequency response is obtained when the variable resistors are in the physically central position. The voltage gain ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.