Mono Preamp based on CMOS IC CD4069

Mono Preamp based on CMOS IC CD4069
Microphone preamp described here is not a professional preamp, but the original preamp and it is cheap and easy to build. Why the original? Because it does not use non-conventional transistors or operational amplifiers (op amps) to amplify the signal from the microphone, but a set of logic gates are commonly used in digital electronics. Digital ICs used are as in the title above which is cmos CD 4049. (more…)

Mono Preamp Based on NE5534

Mono Preamp Based on NE5534
This achievement shows that it is possible to create a balanced dynamic microphone preamp, it is relatively simple. This preamp is particularly suitable for microphones with an output impedance of 200 ohms to 600 ohms. The advantage of the preamplifier is 50 dB, and bandwidth (-3 dB) extends to about 25 KHz. The splitted power supply is required. (more…)