SU586466A1 - Analogue multiplier - Google Patents

Description

(54) ANALOG POSSIBLE DEVICE

one

The invention relates to electrical computing devices and can be used in analog computing machines.

Analog multiplying devices containing an amplifying element with adjustable transmission coefficient and sources of multiplicative multipliers 1 are known.

These devices have a relatively low accuracy of the multiplication operation.

Of the known analog devices, the analogue multiplier device, containing an amplifying element, is closest to the proposed one. , to the non-inverting input of which the output of the first source of the signal-multiplier is connected, the gate of the controlled zero-point transistor is connected to stroke masschtabnogo adder, the first and second inputs of which are connected respectively to the outputs of shifts source; tim netochnika sigiala second n-cofactor 2.

However, this device has an error in performing the multiplication operation caused by the nonlinearity of the controlled zero-field transistor.

The purpose of the invented - the new precision of the operation and reconciliation.

This is achieved by the fact that the third input of the scale adder is connected to the non-inverting input of the amplifying element.

Functional diagram of the proposed analog duplicating device is shown in the drawing.

It contains a controlled field-effect transistor 1, an operator resistor 2, an amplifying element 3, a first source 4 of the signal source, a large-scale adder 5, a second source of 6 a multiplier signal, a source of 7 bias, a terminal of zero and potential.

The operation of the device is based on the dependence of the transmission coefficient on the magnitude of the voltage of the source 6 of the signal-multiplier.

The gate-source voltage of the controlled zero-transistor 1 is equal to

zi, in .. + / C.cm +., (1)

where / СЬ Л2, Кз - transfer coefficients of the mass-based adder 5 from the corresponding input; LBX, - voltage source 4 signal multiplier; Uex, - application