SU875466A1 - Analogue storage - Google Patents

Description

C54) ANALOG RECORDING DEVICE

This invention relates to computing and instrumentation technology and is intended for analog-digital converters, data acquisition systems and analog signal processing devices. An analog memory device is known that contains a capacitor in the input circuit of amplifier 1. However, the accuracy of this device is low because there is no compensation for the voltage of the amplifier: and its drifts. The closest to the proposed technical entity is an analog storage device that contains a capacitor, an amplifier and TpYi of the toggle key, the moving contacts of the first and second toggle keys are connected to the capacitor plates, the moving contact is third to its input, one of the fixed contacts the first transfer key is connected to the input of the device, one of the fixed contacts of the second and the output of the amplifier, one of the fixed contacts of the third common bus, the other fixed contacts of the first The second and third cross over keys are interconnected, the other fixed contact of the second cross over key is connected to the common bus 2. The accuracy of this device is 1 in 1 H F (2) .1 l is the magnitude of the memorized entry. Uftxon voltage; the error of the device caused by the limb gain of the amplifier; the error is due to the presence of a deo voltage bias amplifier; A is the gain of the amplifier. Thus, the bias voltage and, consequently, the bias voltage drift with min. A disadvantage of the known device is the increased complexity caused by the presence of three cross over keys. This also determines the low reliability of the device. Mechanical keys that operate to switch have half the reliability of single-pole keys, and in the meantime of flip keys in-electronic

As a result, as many as six single-pole keys will be needed to work on the closing or opening of switched circuits.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that in an analog storage device that contains a storage element, for example, a capacitor, an amplifier, the first input of which is connected to a zero potential bus, the output of the amplifier is connected to the output of the device, the first, second and third keys, the output of the amplifier is connected to the inputs the first and second keys, the outputs of which are connected to the corresponding capacitor plates, the first capacitor plate is connected to the output of the third key, the input of which is connected to the input of the device, the second switch order condenser connected to a second input of the amplifier

The drawing shows a functional diagram of the proposed device.

The device contains a storage element, for example, a capacitor 1, an amplifier 2, switches 3-5, a bus 6 of zero potential.

The device works as follows.

With closed 4 and 5 and open key 3, the device is in recording mode. Under the action of the voltage Ujx applied to the input of the device, the voltage on the capacitor and is achieved

  Uftj - willows. (3) where and, y is the output voltage of the amplifier;

t .l in

8b (n-i7F O

and)

where EO, A - the displacement voltage and

amplifier gain. Taking into account the expression (4) voltage

charge capacitor 1 will be

.x-; Tr.

When switching to storage mode with a closed key 3 and an open switch 5 and 4, the voltage on the capacitor 1 is fixed.

l

(6)

 - the input voltage of the device at the moment of transition from recording mode to storage mode.

In this case, the voltage at the output of the device is determined by the expression

BbKiTF VL io). (five

In view of expression (6), the output voltage of the device is

WB ,, X (, „.

about)

When A 1 is selected, the device errors are determined (8) as follows.

..

 R

(9) (10)

.t

Thus, the accuracy of the proposed device is not worse than that of the known device, but the device has become much simpler, therefore, the reliability of the analog storage device has also increased. Simplification of the device also leads to an increase in speed, since the proposed device placed on the electronic keys has half the number of them and at least twice fails due to the non-simultaneous operation of the keys.

Claims (2)

1. Foreign electronics 5 №10, 1978, p. 76. 2. USSR author's certificate number 461453, cl. G 11 C 27/00, 1973 (prototype), FT in Lmh-oh