Analogue multipliers are devices in a circuit that take two analogue signals and combine them into one. The output is the product of both of the inputs. For it to be a true analogue multiplier, the two inputs must be identical signals. If the two signals differ in voltage, the second will be scaled proportionally according to the level of the first, and this is called a voltage controlled amplifer.
What are analogue multipliers used for?
Analogue multipliers can be found in the control circuits of some industrial systems, as well as in radar circuitry. They are also used in frequency mixers.
Types of analogue multiplier
The key difference between analogue multiplier is the number of quadrants used: either one, two or four. One and two quadrant multipliers have simpler circuitry, and will therefore be the default if four quadrants are not needed.
Single quadrant multipliers are used when the signal is of only one polarity (either positive or negative).
Two quadrant multipliers can have one signal that is unipolar and another of either polarity.
Gilbert cells, or four quadrant multipliers, can cancel out unwanted signals as they are double balanced
Description:
A range of analogue multipliers and dividers from
Analog Devices suitable for a variety of signal processing applications. Both two and four quadrant types are available, in through-hole and SMT page options. Typical applications for these devices include differential ratio ...
Description:
The STG719 is a high-speed SPDT (single pole
double throw) switch fabricated in silicon gate C2MOS technology. It is designed to operate from 1.8 V to 5.5 V, making this device ideal for portable applications, audio signal routing, video switching, ...
Description:
Analog Devices JFET input operational amplifiers provide high
input impedance and ultralow input bias currents. Many of these JFET op amps are suitable for low noise and high speed applications.
Description:
The zero-drift amplifiers continuously self-correct for dc errors
over time and temperature. Auto-zero and a chopper are combined to enable the amplifier to achieve microvolt-offsets and nanovolts per degree Celsius drift.
