Digitally controlled element sizing

Abstract From the Canadian patent

Effective control of impedance values in integrated circuit applications is achieved with an integrated circuit transistor whose size is digitally controlled. The digitally controlled size is achieved for example, with a parallel interconnection of MOS transistors. In one application the, digitally controlled transistor serves as a controlled impedance connected to an output terminal of an integrated circuit. In that application a number, of transistors are enabled with control signals and the collection of enabled, transistors is responsive to the input signal that normally is applied to a conventional transistor. In another application where the digitally, controlled transistor serves as …