At 12:58 PM 1/22/2004 -0800, you wrote:
>I need to convert a 0V to +5V DC signal to a +0.3V to +10V signal.
>
>Here comes the tricky part, When the signal is +5V the output needs to be
>+0.3V. When the signal is 0V I need the output to be +10V. I am not sure
>how to approach this type of circuit, any ideas would be greatly appreciated.

Just use an op-amp as follows:

                                   1.94 * R
                                     ___
                                 +--|___|---+
                                 |          |
                   0~5V   R      |          |
                           ___   |  |\|     |     10~0.3V out
                    o-----|___|--+--|-\     |
                                    |  >----+----------o
                              +-----|+/
                              |     |/|
                              |
                              |
                              |
                              |
                              |

                           3.402V reference


You can get the 3.402V from a higher voltage with a voltage divider.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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