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50 ohm driver circuit (BC550)

2016-09-17 18:24  
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This article describes a 50 ohm driver circuit (BC550). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: BC550.

When you are connected to buffer a tester to outside tool, we should have an booster with enough bandwidth and power disposition ability. This circuit is a very simple for unity gain buffer; it is only two pairs of emitter followers. The base emitter voltages of Q1 and Q2 cancel out, and so do those of Q3 and Q4. The preset is used to zero out any small dc offsets due to mismatching in the transistors.
It has reasonably high input impedance, 50 ohm output impedance, a wide bandwidth and high slew rate.

50 ohm driver circuit

Related links
Voltage buffer circuit
Analog buffer circuit
Transistor driver circuit
PC serial port buffer
Output buffer by IC 4050
Buffer op-amp by IC LM741
Class A Buffer preamplifier by BC550


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