SU623203A1 - Arrangement for summing delta-modulated signals - Google Patents

Description

and from the point of view of quantization distortions is not significant, especially with small eliciting fV.

Figure 1 is a structural diagram of the proposed device, where the inputs 1 | --1 ||| are labeled sugFgaegee da signals, the element is NOT 2, the element of delay 3 element OR 4, pulse counter 5, pulse shaper b, trigger 7, clock 8 and device output 9.

Figure 2 shows the time diagrams of the device, where the number of the time diagram corresponds to the sigal from the output of the block with the same number.

The device works in the following way.

The input binary DM signals (with the exception of the first one) are delayed in time relative to the other by a time Δl / Nifi and on the 1st track of the OR 4 element, group signal 1nal 4 is generated, which is the compression time factor of the input binary signals. At the same time, the accuracy of the position of the dried DM signals is insignificant. A group signal with an increased clock frequency Ы is supplied to a pulse counter with a division factor (for example, M 2) 5. At the output of the counter, each

X is an informational impulse. Then, these pulses expand in time to T (where TY) and the assignment to the corresponding clock points, following with a frequency of 4 ({j). As a result, a binary signal is generated with a clock frequency of iy, blunt information from all the original DM signals 9.

Thus, for N -2 when adding two DM signals with slope / s

 1-4th T1-1- | R ; . get / that the slope of the total signal. equals

 2

y oif s "

 ": 2 e

what corresponds to the table

In the proposed device, it is possible to change the quantitative ratios between the contributions of the original signals to the output (resulting) signal by applying this signal one and a time to several () inputs of the adder. In this case, the transfer coefficient from this input to the output of the device is equal to 6./N .. in the limit when all the inputs of the device are connected to each other, the output signal is completely identical to the input DM signal.

Normalized slope of the first: SIGNAL

where otf is the slope of the increasing (decreasing) signal ;; C is the increment of the approximating voltage;

IT - clock, frequency; rt is the number of elements.

Claims (2)

1. The patent of England 1372447, Q4 A, 30.iO.74. 2. Authors certificate of the USSR 476682, H 03 K 13/22, 1972.