Patent ID: 9105315
Filing Date: 2015-08-11
Classification: G11C

Abstract:
1. A semiconductor memory storage device for storing data comprising: a plurality of storage cells for storing said data each storage cell comprising an access control device configured to provide said storage cell with access to or isolation from a data access port in response to an access control signal; access control circuitry configured to transmit said access control signal along one of a plurality of access control lines to control a plurality of said access control devices connected to said one of said plurality of access control lines; said access control circuitry comprising: said access control circuitry is configured to respond to a data access request signal to access a selected storage cell connected to a corresponding selected access control line to: control said access switching circuitry to provide a low impedance connection between said voltage source and said access control line such that a voltage level on said access control line changes towards said predetermined access voltage level at a first rate; and in response to said feedback circuitry providing a feedback signal indicating that said access control line voltage has attained a predetermined value to control said access control switching circuitry to provide a higher impedance connection between said voltage source and said access control line such that a voltage level on said access control line changes towards said predetermined access voltage level at a second rate said second rate being slower than said first rate; wherein said feedback circuitry comprises a switching device for generating said feedback signal, said switching device being of a same type as said access control devices and having substantially a same threshold voltage, said switching device switching an output value in response to said voltage level on said access control line exceeding said threshold voltage of said switching device, said switch in the output value indicating to said access control switching circuitry to provide the higher impedance connection between said voltage source and said access control line.