SU1197110A1 - Analog signal multiplexor with scale-time conversion - Google Patents

Abstract

MULTI-ANALOG SIGNALS WITH TIMED TRANSMISSION, containing a synchronization unit, an output switch and N analog shift registers, where N is the number of conversion channels, where the N outputs of the analog shift registers are connected respectively to the N inputs of the output switch, which control input connected to the first control output of the synchronization unit, the second to the N + 1 whose outputs are connected respectively to the control inputs of the analog shift registers, characterized in that, in order to expand the dynamic range, N-1 dual-channel switches and N-1 inverting amplifiers are introduced The N-1 9 outputs of the two-channel switches are connected via the corresponding N-1 inverting amplifiers with the inputs of the second to N analog shift registers, and the control inputs of the two-channel switches with respectively unified with N + 2 to .2 N outputs sync block. .

Description

The invention relates to electronics, in particular to temporary sealing devices.

The purpose of the invention is the expansion of the dynamic range.

The drawing shows a structural, electrical diagram of a multiplex of analog signals with a time-scale conversion.

The time-scale analogue analog multiplexer contains a synchronization block I> output switch 2, N analog registers 3 ¹ , ..., 3 ^N shifts, N - I two-channel switches 4 ** ..., 4 ^ν ' ¹ and Ν- l Inverting, amplifiers 5 ⁴ , ..., 5 ^N ' ¹ .

The device operates as follows.

In the recording mode, signals from the corresponding information inputs through two-channel switches 4 ^ ... 4 ^m ' ¹ and inverting amplifiers 5 ¹ , ..., 5 ¹⁴ ' ^{1 are} recorded in inverse form into analog registers 3 ¹ , ..., 3 ^m shift clock pulses coming from block I synchronization. The output of information is carried out sequentially, and the write and read speeds may vary. Immediately after the end of the recording cycle, the shift related to the first channel of the multi-plexor through the switch to the output of the device is read from the analog register 3 ¹ . In the channels of the multiplexer starting from the second, the reading mode is preceded by a cycle of rewriting information. Overwriting is carried out from the output of the analog shift register 3 through a two-channel switch 4 and an inverting amplifier 5. As a result, in the analog: shift register .3 of the corresponding channel. The signal in phase with 45 input signal will be recorded. Overwriting is performed at the time of the rewriting strobe,, the temporal relations of which satisfy the following expressions:

1197-110

And TPR ~ 6 1sch. ⁼ Λ T;

m = ⁽ⁱ ~ ² ) & 1.

¹ n.pr. 2 ~~ * where I = 2 ..... P;

fiT _nF - overwrite time; DT _MF - reading time; Shopping center ~ read start time. The information storage mode in the analog shift register 3 is divided into two intervals. In the first interval, the signal is stored in inverse form for time

T-K ™ ² ! AT “2 geometric noise. Geometric level. noise in the storage cell is determined by two components: independent and depending on the level 20 of the input signal. The geometric noise component, independent of the level of the input signal, is stationary for this cell of the storage device and depends only 25 on the storage time.

Overwriting is carried out with the inversion of the signal, so the components of the geometric noise will be recorded in those. same cells are analogous * 30th register 3 shifts in the inverse form. In the storage interval preceding the reading cycle, dark currents will accumulate in these cells, the stationary component 35 of which will be compensated by inverse charges of geometric noise accumulated in the first storage interval. In order to further reduce the effect of geometric noise 40 and expand the dynamic range of the device, dubbing with signal inversion can be repeated several times.

Thus, the dynamic ’range of the device is expanded by reducing the stationary level, which does not depend on the level of the input signal, which is a component of geometric noise.

Claims (2)

MULTIPLEXOR OF ANALOGUE SIGNALS WITH SCALE-TEMPORARY CONVERSION, containing a synchronization unit, an output switch and N analog shift registers, where N is the number of conversion channels, and the outputs of N analog shift registers are connected respectively to the N inputs of the output switch, the control input of which is connected to the first control output of the synchronization unit, the second to N + 1 outputs of which are connected respectively to control inputs of analog shift registers, characterized in that, in order to expand the dynamic range, N - 1 two-channel switches and N-1 inverting amplifiers are introduced, and the N-1 outputs of two-channel switches are connected to inverting amplifiers through the corresponding N - 1 with inputs of analog shift registers from the second to N, and the control inputs of two-channel switches are connected respectively from N + 2 to 2 N outputs of the synchronization block.