Patent ID: 8422620
Filing Date: 2013-04-16
Classification: G11C

Abstract:
1. A shift register comprising: a first shift registering unit for generating a first trigger signal at a first output terminal, wherein the first shift registering unit comprises a first pull-down circuit; and a second shift registering unit for receiving the first trigger signal and generating a second trigger signal at a second output terminal, wherein the first trigger signal and the second trigger signal are sequentially asserted, and the second shift registering unit comprises a second pull-down circuit; wherein the first pull-down circuit and the second pull-down circuit perform pull-down operations at different times; wherein when the first pull-down circuit does not perform the pull-down operation, the second pull-down circuit performs pull-down operations to the first output terminal; wherein each of the first and second shift registering units comprises: wherein for the first and second shift registering units, each of the first and second pull-down circuits comprises: