Microphone Amplifier (CB6204E)

This amplifier was found in a 1969 Mullard documentation. The circuit uses transistors that have as modern equivalents the BC548 and BC549.

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High Impedance Differential Amplifier LM324 (CB15183E)
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Optical PFM Receiver (CB15961E)
In the figure we have a receiver for frequency modulated light signals (see the transmitter in...
High Stability Voltage Reference (CB1211E)
In the figure we have a high stability voltage reference, providing a voltage of 10 V at the...