Phase difference-adjusting circuit

DETAILED DESCRIPTION It is an object of the present invention to provide a phase-adjusting circuit with a small circuit scale and simplified operations.
In accordance with the present invention, a phase-adjusting circuit for adjusting a phase difference between a plurality of input data strings, first and second input data strings for example, supplied through two input lines comprises a sync detector for generating first and second sync detection signals by detecting sync signals from the first and second input data strings.
A phase relation-signal generator is responsive to the first and second sync detection signals to generate a phase relation signal representing the phase relation between the first and second input data strings.
A phase difference detector generates a phase difference signal indicative of the phase difference between the first and second data strings.
A first switch is responsive to the phase relation signal to switch the first and second input data strings to produce first and second switched data strings.
A variable-delay circuit is responsive to the phase difference signal to delay the second switched data string to produce a delay data string.
A second switch is responsive to the phase relation signal to deliver the delay data string and the switched first data string to output lines corresponding to the input lines.
Other features and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings.