Integrated shift register
AssigneeEbauches S.A.
InventorJacob Luscher
Life of this patent
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Abstract
The shift register has a very low power consumption. Each cell of the shift register has two stages, each comprising an MOS structure (T.sub.1 -T'.sub.1) which has two principal electrodes (Z.sub.00, Z.sub.1) respectively forming the input (Z.sub.oo) and the output (Z.sub.1) of the stage, and two control electrodes (k.sub.1, k'.sub.1) one of which (k.sub.1) can be connected to a bias source (P) and the other of which (k'.sub.1) is connected to the output electrode (Z.sub.1), and a capacitor (C.sub.1), one plate (Z.sub.1) of which is connected to the said output electrode (Z.sub.1) and the other plate (C.sub.1) of which receives one of two periodic signals .phi..sub.1 (t) and .phi..sub.2 (t) in phase opposition. The register is especially useful in a frequency divider circuit.
Claims6
A shift register comprising a plurality of transistors and capacitors which are integrated in a semiconductor substrate and form a plurality of cells connected one after the other, each cell comprising two identical stages connected in series and capable of being supplied by respective ones of two periodic signals in phase opposition, wherein each stage comprises an MOS transistor structure which has two principal electrodes forming respectively the input and output of the stage, and two control electrodes, one of which is connected, in use, to a bias source and the other of which is connected to the output electrode, and a capacitor, one plate of which is connected to the said output electrode and the other plate of which receives, in use, one of said periodic signals.
A shift register comprising a plurality of cells connected one after the other, each cell having two identical stages connected in series and capable of being supplied by respective ones of two periodic signals in phase opposition, wherein each stage comprises means having two principal electrodes forming respectively the input and output of the stage, and two control electrodes, one of which is connected, in use, to a bias source and the other of which is connected to the output electrode, and a capacitor, one plate of which is connected to the said output electrode and the other plate of which receives, in use, one of said periodic signals.
Dependencies are inferred from the claim text.