A silicon Hall element for application in an analog multiplier

A Hall element with characteristics suitable for application in an analog multiplier has been designed and developed. General multiplier specifications called for inputs up to 2 × 10
^-3
amps and 10
⁴
gauss maximum. Various materials and sensitivity ranges were considered for the element. Stability and circuitry considerations led to the selection of silicon for use in the element. Using approximately 150 ohm-cm n-type silicon the resulting elements exhibited outputs of 1.6 to 1.7 volts at maximum input current and field and outputs of about 1 millivolt at maximum input current and zero magnetic field. Their responses were found to be linear to within approximately ± 0.12 per cent at room temperature over the full range of input parameters.