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Circuit Bench

Switched Preamplifier (CB24513E)
The idea is to interleave this circuit between the signal source and the amplifier. When the...
PNP Constant Current Source (CB1242E)
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...
Unity Gain Second Order Filter (CB25595E)
This low-pass filter with 741 op and symmetrical source was found in the August 1993 issue of...