Hi,
I am trying to make a voltage clamp for an automotive boost sensor.
the sensor on the vehicle has a range of approx 0.8v at atmosphere and 3.0v+ under boost. i wish to clamp it at approx 2.5v - 2.6v,
I built a silicon chip Fuel cut defender ( http://www.siliconchip.com.au/cms/A_108397/article.html ) but if any voltage of less than 1.4v is on the input the output stays at 1.4v and i do not understand why. above 1.4v the input and output are approx the same until the clamping voltage, as expected
an alternative circuit or other suggestion would be much appreciated.
Thanks.
I am trying to make a voltage clamp for an automotive boost sensor.
the sensor on the vehicle has a range of approx 0.8v at atmosphere and 3.0v+ under boost. i wish to clamp it at approx 2.5v - 2.6v,
I built a silicon chip Fuel cut defender ( http://www.siliconchip.com.au/cms/A_108397/article.html ) but if any voltage of less than 1.4v is on the input the output stays at 1.4v and i do not understand why. above 1.4v the input and output are approx the same until the clamping voltage, as expected
an alternative circuit or other suggestion would be much appreciated.
Thanks.