Patent ID: 6765980
Filing Date: 2004-07-20
Classification: G11C

Abstract:
A shift register comprising:a first memory circuit having a first and second input terminal and a first selection circuit which generates a first selected signal from a signal input to the first input terminal or the second input terminal selectively according to a selection signal, a first gate circuit which generates a first gate signal from the first selected signal selectively according to a first clock signal, and a first latch circuit which holds the first gate signal and generates a first output signal from the first gate signal to a first output terminal; a second memory circuit having a third and a fourth input terminal and a second selection circuit which generates a second selected signal from a signal input to the third input terminal or the fourth input terminal connected to the first output terminal selectively according to the selection signal, a second gate circuit which generates a second gate signal from the second selected signal selectively according to a second clock signal complementary to the first clock signal, and a second latch circuit which holds the second gate signal and generates a second output signal from the second gate signal to a second output terminal, and wherein memory circuits having the same configurations as the first and the second memory circuits are connected alternately in series.