Bob wrote:
The original design with 3x75 ohm outputs would be driving a 50 ohm load rather than a 33 1/3 ohm load. That would put it "in spec" for the CLC409 as opposed to just out of spec current limit wise.
Right. Analog video generally ranges from 0 to +1 V, so as a DC-coupled video amp the peak current into 3x75 ohm loads would be +40/-0 mA. Very comfortably within the capability of a CLC409.
A friend recently brought me another commercial video DA, which I'm helping him modify for use as a 1/5/10 MHz DA. It uses EL2099 video drivers, which are specified to provide 440 mA (typical -- 360 mA minimum) of output current. This part should be able to drive 12 or more parallel back-terminated 50 ohm loads to +13 dBm, if desired. (Like the CLC409, the EL2099 is obsolete/NLA.)
Best regards, Charles _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
