Voltage-Controlled Variable-Gain Amplifier

The following table summarizes the details of this symbol.

Description	The gain of this limiting voltage amplifier is a `function` of the voltage (vcp-vcn). VinSym is the input voltage about which the output is symmetrical. VoutSym = (limitHigh + limitLow)/2 Vc is the control voltage, (vcp-vcn) Vin = Vin+ - Vin-
Library name	`variableGainAmplifier`
Properties (Defaults)	gainConst (1) limitHigh (10) limitLow (-10) VinSym (0)
Transfer function	If Vout >limitHigh then Vout = limitHigh If Vout < limitLow then Vout = limitLow
Input impedance
Output impedance	Zero
Frequency response	Flat

The following figure shows an example of Variable Gain Amplifier Operation.