SU1383447A1 - Method and apparatus for storing analog signal - Google Patents

Abstract

The invention relates to computing and instrumentation technology and can be used in the construction of high-speed analog storage devices. The aim of the invention is to increase storage time and speed. Before an analog signal is accumulated, it is differentiated, the accumulated signal is inverted and summed with an analog signal shifted in time. Moreover, a delay line and a differentiation unit, the inputs of which are connected to the signal line, are entered into the analog signal storage device, and the outputs, respectively, are connected to the input of the adder and the input of the storage element. 2 sec. f-ly, 4 ill.

Description

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The invention relates to computing and instrumentation technology and can be used in the construction of high-speed analog storage devices.

The purpose of the invention is to increase storage time and speed.

FIG. 1-3 shows plots of the input signal, forming an accumulated signal, a transformed input and a resulting signal, respectively; in fig. 4 is a block diagram of a device implementing the proposed method.

The device contains an input signal bus; bus 1, a write resolution bus 2,: a differentiation unit 3, a delay line 4, an accumulation unit 5, a zero level bus 6, a key 7, an adder 8, and an output bus 9.

The device works as follows. The input memorized signal S (t) (Fig. 1) is converted into a signal 5ism (g) 5 (/ - t) (Fig. 3) by a delay in time and then summed with a compensating signal SK (/). The compensating signal 5k (;) is formed by differentiating the signal S (t) and its subsequent accumulation, starting from the required point in time fe of the start of memorization (Fig. 2). The compensating signal SK (t) thus generated in amplitude is equal to the increment of the converted memorized signal Zism (t) relative to its value at the moment of occurrence / 3 of the start of memorization 5ism () and inverse to it in sign (Fig. 3). The magnitude of the delay τ of the memorized sial S (t) is determined by the inertia of the process of forming the compensating signal S (t). As a result of the summation of the converted memorized signal S (/) with the compensating signal 5k (0, a constant level signal () is generated equal to the value of the memorized signal at the time instant b of memory start 5 (/ h) (Fig. 3).

Depending on the control signal sent to bus 2, the device can operate in two modes: sampling (in the absence of a control pulse) and memory (when a control pulse arrives).

In both modes, the output of the delay line forms a signal by delaying the input signal 5nzm (t) in time by the value of m.

The value of t is determined by the parameters of the delay line 4 and corresponds to the inertia of the process of forming the accumulated signal. In the sampling mode, the accumulation unit 5 is in the zero mode, and the key 7 is switched so that the second input of the adder 8 is connected to the bus 6 of the zero level. Thus, the accumulated signal is zero.

The output of the device in this mode is equal to the output of the delay line, i.e. it repeats (tracks) the input signal with a time delay t

(Fig. 3).

When a recording resolution signal arrives on bus 2 at the moment of time, the device switches to the memory mode. In this case, the accumulation unit 5 goes to

the accumulation mode, and the key 7 is switched so that the second input of the adder 8 is connected to the output of the accumulation unit 5. The accumulated signal generated at the output of the key 7, in this mode, is equal to the increment of the transformed input signal relative to its value at the instant ti of the start of memorization.

Thus, in the memory mode, a constant level signal is generated at the output of the device, which is equal in amplitude to the value of the input signal at the instant of memory fe (Fig. 3). The amplitude of the output signal of the device in the memory mode does not depend on the change in the input signal and time. Therefore, the proposed method and the device that implements it can practically increase the retention time (memorization) of the required value of the input signal by several orders of magnitude, and theoretically this time can be increased to an infinitely large value.

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Claims (2)

1. An analog signal storing method that consists in accumulating an analog signal, characterized in that, in order to increase the storage time and increase the speed of storing the analog signal, before accumulating the analog signal is differentiated, the accumulated analog signal is inverted and summed with the analog signal, and before the summation, the dust is shifted in time by an amount equal to the time of formation of the accumulated signal. 2. A device for storing an analog signal containing a key-, information accumulation unit, the output of which is connected 5 with the first input key a, adder, the output of which is the output of the device, characterized in that, in order to speed performance, it contains a delay line, the input of which is the information input of the device, the output is connected 0 with the first input of the adder, the differentiation unit, the input and output of which are connected respectively to the input of the delay line and the information input of the information accumulation unit, the second input of the key five is connected to the start input of the information accumulation unit and is the input of the recording resolution of the device, and the key output is connected to the second input of the adder. with t 1 SM 2 fig.d FIG. s