Posted on Sep 14, 2012 5777
This wideband amplifier uses only five components. External signals enter pin 3 of IC1 via ac coupling capacitor Cl. Following amplification, the boosted signals from IC1 pin 1 are coupled to the output by capacitor C2. Capacitor C3 decouples the de power supply, while rf current is isolated from the power supply by rf choke Ll.
The NE5205"s low current consumption of 25 mA at 6 V de makes battery-powered operation a reality. Although the device is rated for a 6 to 8 V power supply, 6 V is recommended for normal operation. From" 6 V an internal bias of 3.3 V results, which pennits a 1.4 V pk-pk output swing for video applications.