JPS62143534A - Signal waveform forming circuit - Google Patents

Abstract

PURPOSE:To attain a stable waveform formation by providing a multi-vibrator which starts an oscillation synchronizing with a serial pulse after a regulated delay time, and a flip-flop circuit which obtains a code signal from a clock signal outputted from the multivibrator and an input signal. CONSTITUTION:A gate signal C having a time L regulated with a resistor R1 and a capacitor C1 is outputted from a multivibrator 11, and at the leading edge of the gate signal C, a clock signal D having a pulse width of T/2 (regulated with a resistor Rt and a capacitor Ct) is outputted with multivibrators 12 and 13. In other words, the oscillation is generated only during a gate time L. The clock signal D is inputted as the clock signal of a flip-flop circuit 14, and a distorted input signal A is inputted as an input data. A pulse E having a normal pulse width T (or integer fold of T) is outputted with the flip-flop circuit 14.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is applied to optical communications, general wired communications, etc., in which a large number of communication devices are connected, a built-in communication device, and a signal signal used in long-distance communication. This relates to a signal waveform shaping circuit that is built into a repeater.

Conventional technology Conventionally, the above-mentioned communication equipment (in the case of No. 19 repeater, a method of inputting all signals to a computer and outputting the data again on the line, and a method of inputting all signals to a computer and outputting the data again on the line, as shown in Fig. 3), etc. A waveform shaping circuit was used. That is, this is a method in which the data is verified as formal data by determining how many or more pulses with a smaller width are included in the pulse width of the input signal, and the data is shaped. In FIG. 3, a counting pulse is created by a crystal oscillation circuit 1 and a frequency dividing circuit 2, and counting is performed by a counter 3 using a gate of an input signal. When the counter 3 reaches a specified value, data is taken in as an input signal, and when the specified number of signals have been taken in, the frequency dividing circuit 2 again outputs the data as forming data according to the specified frequency. In addition, 4 is the count setting section,
5 is an S/P converter, and 6 is an l:P/S converter.

Problems to be Solved by the Invention However, these methods inevitably cause a delay in propagation time. Further, in the circuit shown in FIG. 3, there is a problem such as timing deviation between the input signal and the oscillation clock signal. moreover,
Depending on the frequency, the crystal oscillator circuit and frequency divider circuit may be affected and basic circuit changes may be required.

Page 3 Means for Solving the Problems In order to solve the above problems, the present invention provides a multivibrator that starts oscillating after a certain delay time in synchronization with an input serial pulse code, and an output signal from the multivibrator. It comprises a flip-flop circuit that obtains a code signal from a clock signal and an input signal.

A multivibrator is used as an oscillator circuit, the clock signal used for signal and waveform shaping is completely synchronized with the input signal, and the waveform is shaped by a flip-flop circuit.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

In FIGS. 1 and 2, 11 is a multivibrator, which outputs a gate signal (c) at a time determined by a resistor R1 and a capacitor C1. At the fall of this gate signal (c), a clock signal with a pulse width of T/2 (determined by the resistor R4 and the capacitor Ct) is outputted by the multivibrator 12-13. In other words, it oscillates only during the gate time. This clock signal) is inputted as a clock signal of the flip-flop circuit 14, and the distorted input signal (A) is inputted as input data.

This flip-flop circuit 14 allows the normal pulse width T
(or an integral multiple of T) pulses (e) are output.

That is, the shaped t'I-/this signal is output at 111.

Advantages of the Invention As described above, the present invention has the following advantages: 1: The circuit configuration is simple, and the clock signal and input signal are synchronized, resulting in stable waveform shaping. Furthermore, since a stable clock signal can be generated by simply adjusting the values of some resistors and capacitors for any frequency, there is no need for circuit modification. Furthermore, modification by data configuration can be freely performed because any gate width can be obtained by changing the values of some resistors and capacitors.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of a five-page signal waveform shaping circuit showing an embodiment of the present invention, Fig. 2 is a signal waveform diagram of each part of the circuit, and Fig. 3 is a circuit diagram of a conventional signal waveform shaping circuit. . 11.12.13... Multivibrator, 14.
...Flip-flop circuit.

Claims (1)

[Claims] A signal waveform shaping circuit consisting of a multivibrator that starts oscillating after a certain delay time in synchronization with an input serial pulse code signal, and a flip-flop circuit that obtains a code signal from the clock signal output from the multivibrator and the input signal.