Patent ID: 7479713

Claim:
A disk drive system, comprising: a fixed output voltage regulator including an output terminal that provides a substantially fixed output voltage; a plurality of loads, each including a voltage supply terminal; and an amplifier circuit configured to receive the substantially fixed output voltage of said voltage regulator and to provide a further voltage, to said voltage supply terminals of said loads, that is less than said substantially fixed output voltage of said fixed output voltage regulator, yet greater than a highest minimum operating voltage of said plurality of loads; wherein said amplifier circuit includes: an operational amplifier including a first input, a second input and an output, said first input connected to said output terminal of said fixed output voltage regulator, said output of said amplifier connected to said voltage supply terminals of said plurality of loads; a first resistor connected between said output of said amplifier and said second input of said amplifier; and a second resistor connected between the said second input of said amplifier and a low rail voltage; wherein said first and second resistors are selected such that a voltage at said voltage supply terminals of said plurality of loads is less than said substantially fixed output voltage of said fixed output voltage regulator, yet greater than a highest minimum operating voltage associated with said loads.