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Stereo encoder
This simple stereo encoder circuit schematic is build with 2 IC MMC4066E and MMC4047 and one transistor BC547B. On IC1 2 and 3 pins is the audio output which is amplified by T1 ( current amplification ). On IC2 pin 10 you can find 19kHz pilot tone frequency. To adjust the frequency rotate R13 [...]
Automatic Gain Control - AGC
Automatic Gain Control or AGC is a circuit design which maintain the same level of amplification for sound or radio frequency. If the signal is too low the AGC circuit will increase ( amplify ) the level and if is to high will lower it to maintain a constant level as possible.
The Automatic Gain Control [...]
ZN414Z ZN415E ZN416E datasheet specifications
ZN414Z, ZN415E, ZN416E are AM radio receivers IC.
Features:
- Single cell operation (1.1V to 1.6v operating range)
- Low current consumption
- 150KHz to 3MHz frequency range (full coverage of medium and long wavebands)
