Patent ID: 11894810
Assignee: STMICROELECTRONICS S.R.L.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method for operating a circuit to perform sensing and control of a fly height type in a hard disk drive using a sense resistor, the method comprising:
applying a constant voltage to the sense resistor corresponding to a selection of a voltage mode operation of the circuit;
applying a constant current to the sense resistor based on a selection of a current mode operation of the circuit;
filtering input signals from the sense resistor using a high-pass filter or a low-pass filter; and
amplifying, using a first amplifier circuit and a second amplifier circuit, the input signals from the sense resistor in accordance with a variation in resistance at the sense resistor, wherein the first amplifier circuit comprises a first transistor, a first load resistor, a first capacitor, and a first current generator, and wherein the second amplifier circuit comprises a second transistor, a second load resistor, a second capacitor, and a second current generator.