Amplifier Circuit DiagramsPower Supplies

Five-output Video Distribution Amplifier Schematic Circuit Diagram

Video fans and professionals in the field will find this small signal distributor/amplifier an excellent ally when it’s necessary to distribute a single video signal across several pieces of equipment. The circuit shown here should have a lot of applications.

Basically, the distribution amplifier takes the composite video signal from a video player (VCR) or a video generator (analog output) and buffers it in such a way that it can be simultaneously applied to up to five different video equipment inputs, like monitors, TV sets, other VCRs and so on. For example, in a hall, the image produced by a central DVD player can be shown on five different TV screens with the sound reproduced through a separate amplifier. The circuit is based on the type EL2020 (or similar) operational amplifier which is marled by large bandwidth.

Five-output Video Distribution Amplifier Schematic Circuit Diagram

The LL2020 amplifies the video signal applied to the input stage, with a gain adjustment range of ±6 dB. Output transistor Q1, a 2N3866, applies the video signal to the five outputs designed to drive loads with 75-Ω impedance Video fans and professionals in the field will find in this small signal distributor/amplifier an excellent ally when it’s necessary to distribute a single video signal across several types of equipment. The circuit shown here should have a lot of applications.

Basically, the distribution amplifier takes the composite video signal from a video player (VCR) or a video generator (analog output) and buffers it in such a way that it can be simultaneously applied to up to five different video equipment inputs like The circuit requires a ±12 V symmetrical supply voltage, which can be obtained from a conventional power supply as shown by the schematic.

The CENTRAL SEMICONDUCTOR 2N3866 and 2N3866A are Silicon NPN RF Transistors, mounted in a hermetically sealed package, designed for high-frequency amplifier and oscillator applications.

  • Package Type: TO-38
  • Transistor Type: NPN
  • Max Collector Current(IC): 0.4A / 400mA
  • Max Collector-Emitter Voltage (VCE): 30V
  • Max Collector-Base Voltage (VCB): 55V
  • Max Emitter-Base Voltage (VEBO): 4V
  • Max Collector Dissipation (Pc): 5 Watt
  • Max Transition Frequency (fT): 500 MHz
  • Minimum & Maximum DC Current Gain (hFE): 10 – 200
  • Max Storage & Operating temperature Should Be: -65 to +200 Centigrade
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