Wide Bandwidth

SIGNAL MULTIPLIER

FEATURES

q WIDE BANDWIDTH:

75MHz — Current Output

30MHz — Voltage Output

q LOW NOISE

q LOW FEEDTHROUGH: –60dB (5MHz)

q GROUND-REFERRED OUTPUT

q LOW OFFSET VOLTAGE

APPLICATIONS

q MODULATOR/DEMODULATOR

q VIDEO SIGNAL PROCESSING

q CRT GEOMETRY CORRECTION

q CRT FOCUS CORRECTION

q VOLTAGE-CONTROLLED CIRCUITS

DESCRIPTION

The MPY600 is a wide-bandwidth four-quadrant

signal multiplier. Its output voltage is equal to the

algebraic product of the X and Y input voltages. For

signals up to 30MHz, the on-board output op amp

provides the complete multiplication function with a

low-impedance voltage output. Differential current

outputs extend multiplier bandwidth to 75MHz.

The MPY600 offers improved performance compared

to common semiconductor modulator or multiplier

circuits. It can be used for both two-quadrant (voltage-

controlled amplifier) and four-quadrant (double-

balanced) applications. While previous devices

required cumbersome circuitry for trimming, balance

and level-shifting, the MPY600 requires no external

components. A single external resistor can be used to

program the conversion gain for optimum spurious-

free dynamic range. When used as a modulator, carrier

feedthrough measures –60dB at 5MHz.

Differential X, Y and Z inputs can be connected in a

variety of useful configurations, including squarer,

divider, and square-rooter circuits. The MPY600 is

available in 16-pin plastic DIP, specified for the indus-

trial temperature range.

Multiplier

Core

I

= (X – X )(Y – Y ) mA

X

1

X

2

Y

1

Y

2

R

Y

R

Y

Z

1

Z

2

+

–

+

–

+

–

+

–

∆

O1

2

1

2

V

O

I

V Reference

and

Bias

–V

S

+V

S

P

I

N

V = A

+ Z – Z

O

2

1

(X – X ) (Y – Y )

2V

12

1

2

[

]

FPO

MPY600

®

International Airport Industrial Park

•

Mailing Address: PO Box 11400

•

Tucson, AZ 85734

•

Street Address: 6730 S. Tucson Blvd.

•

Tucson, AZ 85706

Tel: (520) 746-1111

•

Twx: 910-952-1111

•

Cable: BBRCORP

•

Telex: 066-6491

•

FAX: (520) 889-1510

•

Immediate Product Info: (800) 548-6132

PDS-1019C

Printed in U.S.A. October, 1993