SU886283A1 - Bipulse-to-binary signal converter - Google Patents

Description

The invention relates to a semiconductor technique and can be used in digital information transmission systems for reconstructing a signal at a reception. A device comprising three differential stages, two triggers, a comparison circuit, a waiting multivibrator and a former is known, the input terminal being connected via a differential cascade to the multivibrator, the first input of the comparison circuit and the first input of one trigger, the second input of which is connected through the former and the differentiating cascade with the output of the multivibrator, another output of which is connected to the first input of the second trigger, and another input of the second trigger is connected to the output of the first trigger through the reference element . The known device is difficult and not sufficiently noise-resistant. The purpose of the invention is to simplify the device by reducing the number of differentiating units and eliminating the standby multivibrator and improving noise immunity. To achieve this goal, a device containing a differentiating unit and a series-connected controlled pulse shaper, a delay element and a trigger, whose information input is combined with a differential information input (its direct and inverse trigger output blocks are connected to the control inputs of a controlled pulse shaper , the first and second information inputs of which are connected to the first and second outputs of the differentiating unit. In Fig. 1, the structural-electrical cc is shown ma proposed transducer signal into a binary biimpulsnogo- FIG 2 - diagrams for explaining its operation kntsie..

The device contains a differentiating unit 1, a controlled pulse shaper 2, a trigger 3 and a delay element 4.

The device works as follows. Input bi-pulse signal and is fed to the information input of the trigger 3 and the input of the differentiating

block 1, one output of which

the pulses in position correspond to the leading edges of the input signal 6 and on the other to the falling edges 5. Depending on the state of the trigger 3, the output of the controlled signal conditioner 2 passes signals either from one output of the differentiating unit 1 or from another, so that the output of the control signal generator of the signal conditioner 2 generates a sequence of pulses 2 having the clock frequency of the input signal bi-pulse signal. At the output of the delay element 4, these pulses have the position q which provides the most stable recording of information of the input bi-pulse signal c. trigger 3, at the output of which an information binary signal & . This signal goes to the output of the device, and also controls (together with the signal and from the inverse output of the trigger H) controlled by the driver 2 signals, ensuring that only

those pulses that form TOBjno sequence 2-,

Dp to ensure maximum stability of the device when the input signal jitters, the delay value of the delay element 4, is determined from the ratio

t 0,75T- Tj --1 (T, h - tr,

where T is the period of the clock frequency; T, Tj, Tj, - delays respectively

elements I, 2 and 3. Compared with the known, the proposed device is twice as simple (by the number of structural elements of the same complexity). It contains only one setting time (a delay element instead of two (a standby multivibrator and a pulse shaper of a certain length) and one differentiating cascade instead of three, which determines the greater noise immunity of its operation.

Claims (1)

1. USSR author's certificate number 497740, cl. H 04 L 7/00, 1974 (prototype). fpUi.f Kd "M tM : Q. 114 P oa "