JPS61203786A - Signal receiving device - Google Patents

Abstract

PURPOSE:To remove the effect of phase distortion of the transmission channel and to enable data to be received surely by making the phase of the input data and that of the clock signals coincident with each other by adjusting the phase of the clock signals and holding the input data by a latch circuit by clocks. CONSTITUTION:The R, G, B chrominance signals constituting the picture data are inputted to the latch circuits 11-13 while clock signals CLK are introduced to a clock generating circuit 14. Clock signals are generated in correspondence to the input CLK from the circuit 14 and supplied respectively to phase adjustment circuits 15, 16, 17. The circuits 15, 16, 17 are provided with switches 18, 19, 20 setting the phase amount of the clock signals. These switches set the phase amount suited to the phase of the signals R.G and B with respect to the input clock signals so that the clock signals CLKR, CLKG and CLKB are supplied respectively to the circuits 11, 12 and 13. Hence, the signals R, G and B and CLKR, CLKG and CLKB are coincident in phase with one another so that the R. G and B signals are received surely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a signal receiving device applied to, for example, a color printer device.

[Technical background of the invention and its problems]

As is well known, for example, a color printer device receives RlG, B (red, green,
Color image data consisting of blue) signals and this 1Ili
A clock signal synchronized with the image data is supplied, and each image data is received in accordance with this clock signal.

Figure 5 shows a conventional signal receiving device. The latch circuits 51, 52, and 53 are supplied with RlG and B signals constituting color image data from an external device (not shown), as well as a clock signal CLK. The signal is now being received. Further, the phase of this clock signal CLK is adjusted using, for example, the R signal as a reference.

By the way, when such a signal receiving circuit is supplied with R, G, and B signals that are out of phase with the clock No. 1 CLK as shown in Fig. 6, the R and G signals are sent to the latch circuits 51 and 52.
However, the B signal cannot be received by the latch circuit 53.

As described above, conventional signal receiving circuits have the disadvantage of not being able to reliably receive color image data if the phases of the R, G, B signals and clock signals are shifted due to external equipment, transmission lines, etc. was.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and its purpose is to provide a signal receiving device that can reliably receive data by removing the influence of phase distortion in external equipment or transmission paths. This is what I am trying to do.

[Summary of the Invention J] This invention allows the phases of the JG, B signals, and clock signals to be controlled individually by JIE'l.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, latch circuits 11, 12, and 13 are supplied with L, G, and B signals constituting color image data from external devices (not shown), respectively, and a clock signal CLK is supplied to a clock generation circuit 14. be done. This clock generation circuit 14 generates a clock signal corresponding to the input clock signal CLK, and these clock signals are supplied to phase adjustment circuits 75 and 16, 17 each comprising, for example, a gate circuit or a digital delay element. These phase=aSt circuits 15, 16, and 17 have switches 18, 19, and 2 that set the phase amount of the input clock signal.
0 are provided respectively, and these switches Ill.

19. In step 20, a phase amount matching the phase of the above-mentioned 几, G, and B signals is set for the input clock signal.

In this way, the clock signal C matches the phase of the R, G, and B signals output from each phase adjustment circuit 15, 16, and 17.
LKR, CLKo.

CLKB is supplied to latch circuits 11, 12, and 13, respectively. Therefore, R, G of the phase as shown in Figure 2
, even if the B signal is the clock signal CLKR, CLK,
, CLKB are matched in phase with the R, G, and B signals, respectively, so it is important to reliably receive the R, , C), and B signals.

Next, other embodiments of the invention will be described. The same parts as in the above embodiment are designated by the same reference numerals. In Figure 1-3, the phases of the clock signals CLK supplied to the valley latch circuits II and 12.13 are the same, and the phase adjustment circuits 31, 32, 33,
Switches 34, 35.degree. 36 are used to match the phase of the clock signal. Even with such a configuration, it is possible to obtain the same effects as in the embodiment described above.Furthermore, FIG. 4 shows clock signals CLK, R, and G.

Phase adjustment circuit for both B signals 15°16.17
, 31.32.33 and switches 18.19, 20,
34, 35, and 36 to match their phases, and 41 in the figure has the same configuration. By conducting such an acceptance inspection, it is possible to receive color image data more reliably.

It goes without saying that other modifications can be made without changing the spirit of the invention.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a signal receiving apparatus capable of reliably receiving data by removing phase distortion T:/ in an external device or a transmission path.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a signal receiving device according to the present invention, FIG. 2 is a diagram shown to explain the operation of FIG. 1, and FIG. 3 and FIG. Fig. 5 is a block diagram showing a conventional signal receiving device, and Fig. 6 is a diagram shown to explain the operation of Fig. 5. 11.12.13...Latch circuit, 15,16°17
．． 31, 32. 33... Phase adjustment circuit, 1g. 19.20,34,35.36...Switch. Applicant's agent Patent attorney Suzue Takehiko Purification of drawings vJ
(No change in content) Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Patent Application No. 1986-45142 No. 2! ! Ming's name signal receiving device 3, relationship with the name weight of supplementary iE Patent applicant Billion Co., Ltd. Toshiba 4, representative 1g person address 2g Shinbe Minato-ku Tora/Bar! 'Jro 26 No. 5 No. 17
Yu pill 5, spontaneous correction

Claims (2)

[Claims] (1) It is characterized by comprising a holding means for holding input data using a clock signal, and an adjusting means for adjusting the phase of at least one of the data or the clock signal to match the phases of the data and the clock signal. Signal receiving device. (2) The data is R, G, which constitutes color image data.
, B signal.
Signal receiving device as described in section.