Video_amplifier

178

01:23:09

Real circuit! Works 2 years. Input and output impedance is 75 Ohm, current source is JFET transistor (yet not in library), LED works as  a zener diode and an indicator. Frequency correction conpensate losses in long cable. 

published 11 years ago

hurz

11 years ago

For what video system you use this? I'm asking because e.g. PAL for german TV just have a bandwidth of 5MHz and your amp does provide much more plus some emphasis around 10MHz.

alexmayorov

11 years ago

It works in CCTV system to increase signal from video camera, removed by 150 meters, near registrator. It works in Secam, NTSC, PAL. To switch off correction, remove 2.2nF capacitor.

alexmayorov

11 years ago

Это реальная схема работает 2 года в системе видеонаблюдения. Входной и выходной импеданс равен 75 омам. Источник тока 3 мА на самом деле полевой транзистор (в этой библиотеке его пока нет). Светодиод работает стибилитроном и индиктором включения (слабо светится). Частотная коррекция компенсирует потери в длинном (около 150 метров) кабеле.

hurz

11 years ago

Ok makes sense!

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