EL4083C Elantec Semiconductor, Inc. (acquired by Intersil), EL4083C Datasheet - Page 12

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

Applications
Basic Product Functions
Figures 18 and 19 are the basic schematics for
many of the applications of the EL4083 These
can perform signal mixing frequency doubling
modulation demodulation gain control voltage-
controlled
squaring Figure 18 has resistively terminated
differential outputs and has the widest band-
width The figure also shows the option of using
the EL2260 dual CMF amplifier to recover the
outputs differentially at very low impedance
EL4083C
Current Mode Four Quadrant Multiplier
amplification
Table 2 Input Signal Assignments for Figures 18 and 19 Circuits
X means not connected if function is not used
Mixer
Frequency Doubler
Modulator
Demodulator
Gain Control VCA
Multiplier
Squarer
Application
multiplication
Signal 1
Signal
Modulating Signal
Local Oscillator
Gain Control
Signal 1
Signal
and
12
V
X
This has a maximum 3 dB bandwidth of
130 MHz and settles to 1% in 25 ns Figure 19
uses an EL2075 at the outputs as a differential to
single ended converter with gain to take advan-
tage of the performance enhancements of the dif-
ferentially recovered output mentioned above
and to provide a high level low impedance drive
The
150 MHz using good layout techniques Howev-
er to achieve this bandwidth one must restrict
the output swing to little more than 1 Vpp to
avoid running into the 500V
rate of the EL2075 Table 2 shows the input sig-
nal assignments for the applications listed above
b
3 dB bandwidth of this circuit is over
Signal 2
Signal
Carrier
Modulated Signal
Signal
Signal 2
Signal
V
Y
s minimum slew