Mark wrote:
I need a simple and cheap circuit to level shift the TTL signal to +/- 0.50V It probably needs clean, stable, fast edges and able to drive a 50 ohm load
See attached. The resistor values shown assume that the source is a 0-5v rectangular signal able to source +/- 10mA with negligible voltage drop (a single 74AC or 74HC gate will do that). The edges will be as fast as the source. The symmetry and stability will be the same, as well.
Best regards, Charles
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