el2082 Intersil Corporation, el2082 Datasheet - Page 13

• Manufacturer Part Number: el2082
• Description: Current Mode Multiplier
• Manufacturer: Intersil Corporation

EL2082 Macromodel
This macromodel has been designed to work with PSPICE
(copywritten by the Microsim Corporation). E500 buffers in
the V
the I
channel and replicates the I
voltage. R500 and C500 provide the bandwidth limitation on
the current signal. E502 supplies the V
and drives the L501/R501/C501 to shape the gain control
frequency response. E503 does the actual gain-control
multiplication, and drives delay line T500 to better simulate
the actual phase characteristics of the part G500 creates the
current output, and R
parasitics.
The model is good at frequency and linearity estimates
around V
limitations:
• The V
• The V
• Frequency response does not vary with supply voltage
• The V
• Noise is not modeled
• Temperature effects are not modeled
• CMRR and PSRR are not modeled
• Frequency response does not vary with V
Unfortunately, the polynomial expressions and two-input
multiplication may not be available on every simulator.
output gain reverses - don't use V
IN
IN
pin. E501 supplies the non-linearity of the current
voltage and presents it to the R
G
G
IN
G
channel does not give zero gain for V
channel is not slew limited
channel is not slew limited
= 1V and nominal temperatures, but has several
OUT
with C
IN
13
current to a ground referenced
OUT
G
provide proper output
FIGURE 12. SCHEMATIC OF EL2082 MACROMODEL
< 0
INI
GAIN
resistor to emulate
G
non-linearity
G
< 0; the
EL2082
Results have been confirmed by laboratory results in many
situations with this macromodel, within its capabilities.