Back to results
US 6,271,978 B1Granted
Power efficient overshoot control for magnetic recording write driver
AssigneeTexas Instruments Incorporated
InventorsDavid J. Block, Timothy G. Moran
Life of this patent
Estimating the term…
Abstract
A circuit for a write driver including a blanking circuit to output a blanking signal to interrupt a current path. The current path is for first and second currents used to drive an inductive load in an H-bridge circuit. The blanking signal may be delayed by a programmable amount.
Claims7
A circuit for eliminating overshoot from a write signal, comprising:
- an H-bridge circuit to switch between a first current and a second current to a load;
- a switch circuit directly connected to said H-bridge circuit to form a switchable current path for said first current and said second current;
- and
- a blanking circuit to control said switch circuit by outputting a blanking signal to correspond to the period of time said switch circuit interrupts said current path for said first and said second current,
- wherein said blanking circuit includes a delay circuit to delay said blanking signal.
2 more elements
A system for a disk drive, comprising:
- a write/read circuit to write and read data to a disk;
- a preamplifier for amplifying said data read from disk;
- a read/write channel to condition said data read and written to disk;
- and
- a controller connected to said read/write channel to communicate said data with a host system,
- wherein said write/read circuit comprises:
- a circuit for eliminating overshoot from a write signal, comprising:
- an H-bridge circuit to switch between a first current and a second current to a load;
- a switch circuit directly connected to said H-bridge circuit to form a switchable current path for said first current and said second current;
- and
- a blanking circuit to control said switch circuit by outputting a blanking signal to correspond to the period of time said switch circuit interrupts said current path for said first and said second current,
- wherein said blanking circuit includes a delay circuit to delay said blanking signal.
9 more elements
A method for eliminating overshoot from a write signal, comprising the steps of:
- switching between a first current and a second current to a load with a H-bridge circuit;
- forming a current path directly connected to said H-bridge circuit for said first current and said second current;
- controlling said switching of said first and said second current with a blanking signal;
- and
- interrupting said current path during a period of time corresponding to said blanking signal,
- wherein said interrupting step includes the step of delaying said blanking signal.
3 more elements
Dependencies are inferred from the claim text.