JAJSHP9E November 2007 – July 2019 VCA824
PRODUCTION DATA.
A multiplier requires two inputs, one for the X input and one for the Y input. The output of the multiplier circuit is in the form of Vout = aVin1 × bVin2 : where a and b are real numbers and should not be negative. For four quadrant operation both positive and negative inputs must be supported on the X and Y inputs.
A four-quadrant multiplier can easily be implemented using the VCA824. By placing a resistor between FB and VIN, the transfer function depends upon both VIN and VG, as shown in Equation 10