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Model integrated circuit multiplier   Integrated Circuits   The
Multiplier block models an integrated circuit multiplier. The
block implements the following equation, which defines the
voltage applied to the output port:  where X1, X2, Y1, Y2, Z1,
Z2 are the voltages presented at the input ports, A is the gain,
and K is the scale factor.  In a typical multiplication circuit,
the output is fed back into input Z1, which results in the
following gain (assuming that A is large):  The value of the
scale factor K is usually altered by an external resistor bias
network. The Multiplier block implements K as an internal gain,
and the external bias network is not necessary for system
simulation. A typical value for K is 10, with a typical
adjustment down to 3.  You can use the Multiplier block to
implement a number of other functions, as well as
multiplication. Examples include division, squares, and square
roots. For example circuits, consult manufacturer