EL4083C Elantec Semiconductor, Inc. (acquired by Intersil), EL4083C Datasheet - Page 14

• Manufacturer Part Number: EL4083C
• Description: Current Mode Four Quadrant Multiplier
• Manufacturer: Elantec Semiconductor, Inc. (acquired by Intersil)

Other Applications
Elantec has also published an applications note
covering other applications of the EL4083 These
include dividers squaring and square rooting cir-
cuits several RMS and power measurement cir-
cuits and a wideband AGC circuit Also present-
ed are two polynomial computation examples for
video and some HDTV quality fader and sum-
ming circuits The EL4083 has been found flex-
ible enough to easily implement all of the classic
four quadrant multiplier applications and also of-
fer interesting new applications possibilities
EL4083 Macromodel
This macromodel is compatible with PSPICE
(copywritten by Microsim Corporation)
been designed to work accurately for fixed values
of I
additional simulation burden imposed by includ-
ing provision for a time varying I
not worthwhile The value of I
the model by the parameter NS The relation be-
Macromodel
VJ
VJ
BF
IS
C1 N9 N7 9p
C2 N7 0 350f
C3 N19 N16 9p
C4 N16 0 350f
subckt EL4083 ZIN XIN YIN VEE VCC IXY IYX
MODEL M1MP5DIODE D TT
MODEL M2MDCAP D TT
MODEL M3MNPN1 NPN CJC
MODEL M4MPNP1 PNP CJC
EL4083 Macromodel
Revision A August 22 1994
Connection IZ(BIAS)
EL4083C
Current Mode Four Quadrant Multiplier
e
e
e
e
Z
1f BF
600m XTI
800m RS
120 CJS
(bias) in the range of 200 A to 1 6 mA The
l
l l
l l l
l l l l
l l l l l
l l l l l l
l l l l l l l
e
IX(in)
90 CJS
e
e
IY(in)
e
480f
300
VEE
3 EG
e
VCC
480f
IXY
e
1 11 RS
IXY
e
e
e
1 79p TF
e
80m
100n IS
e
1 3p TF
60p IS
Z
e
Z
is specified to
e
e
50 166666666667p
e
was thought
2e-17 CJO
120p IS
1f CJO
It has
e
e
1 04f
e
300f
1p
14
tween I
inputs can accept time varying signals
The model will provide good transient and fre-
quency response and settling time estimates as
well as time domain switching results Input and
output impedance and overload responses are
correctly modeled The D C current drawn from
supplies for a given value of I
Noise PSRR and the temperature dependence of
A C parameters such as frequency response and
settling time are not modeled Linearity and dis-
tortion results from the model will be worse than
the real part by about a factor of three and do not
show the correct frequency dependence
The macromodel is constructed from simple con-
trolled sources passive components and stripped
transistor and diode models As such it should be
usable perhaps with slight modification on all
but student or demonstration simulators where
the model’s size may be a problem
D1 0 N15 M2MDCAP 12
D10 0 N26 M1MP5DIODE 1
D11 N26 N27 M1MP5DIODE 1
D12 N29 N30 M1MP5DIODE 1
D13 0 N31 M1MP5DIODE 1
D14 VBP N34 M1MP5DIODE 2
D15 N34 VBP M1MP5DIODE 2
D16 0 N34 M2MDCAP 12 5
D17 N35 0 M2MDCAP 12 5
D18 N35 VBN M1MP5DIODE 2
D19 VBN N35 M1MP5DIODE 2
D2 N15 0 M2MDCAP 12
D20 N42 N10 M2MDCAP 4
D21 N10 0 M2MDCAP 4
D22 0 N20 M2MDCAP 4
D23 N20 N45 M2MDCAP 4
D3 0 N12 M1MP5DIODE 8
D4 N55 N13 M1MP5DIODE 8
D5 0 N25 M2MDCAP 6
D6 N25 0 M2MDECAP 6
D7 0 N22 M1MP5DIODE 8
D8 N54 N23 M1MP5DIODE 8
D9 0 N28 M1MP5DIODE 1
EV94 0 VBN 0 N45 1
Z
and NS is I
Z
e
200 A
Z
is also correct
c
NS All other