Patent ID: 6011418
Filing Date: 2000-01-04
Classification: G11B,H03H

Abstract:
An apparatus, comprising:a first transistor, said first transistor having a control input to which a control voltage is applied, having first and second terminals, and having a first current flowing between said first and second terminals; anda trimming circuit, said trimming circuit including:a trimming terminal which is coupled to said second terminal of said first transistor;a control terminal coupled to said control input of said first transistor;a plurality of second transistors which each have a control input and have first and second terminals, said trimming circuit being operative to selectively cause each of said second transistors to have an operational state which is one of an enabled state and a disabled state, each said second transistor which is in the enabled state having the second terminal thereof operatively coupled to said trimming terminal, having the first terminal thereof operatively coupled to a voltage, and having the control input thereof operatively coupled to said control terminal, a second current flowing at said trimming terminal being the sum of currents flowing between said first and second terminals of each of said second transistors which are in the enabled state.