SU917341A1 - Decoding device decoder - Google Patents

Description

(54) DECODING DEVICE

I

Filament is a communication technique and in particular can be used to decode digital signals in communication systems with pulse code modulation.

Known decoders containing a second pulse selector, an adder, delay elements, shift registers, logic elements 1.

They operate in a wide frequency band, but are of low reliability due to the large number of elements and connections.

The closest to the proposed device is a decoder unit with a second pulse selector, RJ-driver, impedance drivers, shift register, and OR 2 element.

The device works in a wide frequency band, but does not have sufficient reliability.

Chain iaofeteni - increased reliability.

To achieve this goal, a decoding device containing a selector signal of the second pulse, whose inputs are connected to the input buses, pulse drivers whose outputs are combined, has a D-trigger D, -C-and R-, whose inputs are connected respectively to the outputs of the pulse shapers, the input of the clock signal and the first output of the selector of the second pulse, the second output of which is connected to the inputs of the impuls drivers. .

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FIG. 1 shows a block diagram of the device; in fig. 2 - time diagram of work.

The decoding device contains a selector 1 of the second pulse, a pulse former 2, a pulse former 3, a trigger 4.

The decoding device operates as follows.

Claims (2)

The coded sequence of 20 pulses in the code of the positive (Fig. 2a) and negative (Fig. 26) polarities psm steps at the inputs of the second and pulse selectors. At the first output of the selector 1, every second pulse will be allocated from the corresponding encoded kbk of positive and positive polarity (Fig. 2c). At the second output of the selector of the second pulse, a pulse sequence (Fig. 2d) is formed, changing its state with the arrival of each coded sequence of one polarity. The pulse shapers form short, pulses from the front and edge of the incoming pulse sequence (Fig. 2e). From the output of the formers, a sequence of pulses arrives at the D-output of the D-trigger, and every second selected pulse arrives at the input of zeroing R. If they coincide, there is no output pulse. Thus, at the output of the trigger (Fig. 2e) the decoded pulse sequence will be. Thus, the introduction of the D-trigger and new connections allows us to simplify the device, since it contains a smaller number of elements and connections. As a result, its adjustment is simplified, reliability is improved. All this rasigar em scope of its application. The formula of the invention. A decoder comprising a selector of the second pulse, the shifts of which are connected to the input buses, pulse formers, the outputs of which are. For the sake of reliability, the D-trigger D, -C- and R- are entered, the inputs of which are connected respectively to the outputs of the pulse formers, the input of the clock signal and the first output of the selector of the second pulse, the second output of which is connected to the inputs pulse shapers. Sources of information taken into account in the examination 1.Patent of Germany N 243О76О, cl. H 03 K 13/24, 1978. 2. USSR author's certificate on the title number 2774179/18/21, cl. H 03 K 13/24, 1979. Figg