Title :
150 Mb/s Write Amplifier for Hard Disk Drives with Near Rail-to-Rail Voltage Swing
Author :
Veenstra, H. ; Voorman, J.O. ; Ramalho, J.N. ; Desbonnets, E.
Author_Institution :
Philips Research Laboratories, Prof. Holstlaan 4, Eindhoven, The Netherlands
Abstract :
An integrated write amplifier meant for use with magneto-resistive (MR)-read/inductive- write heads is presented. To achieve short rise- and fall-times, it incorporates near rail-to-rail output voltage swing using a NPN-VPNP push-pull output stage combined with common mode control. After deriving some physical lower limits for rise- and fall-times, the main circuit principles are explained. The circuits have been used successfully in a 10 channel, 5 Volt MR-read/inductive-write amplifier.
Keywords :
Bandwidth; BiCMOS integrated circuits; Frequency; Hard disks; Laboratories; Magnetic heads; Rail to rail amplifiers; Rail to rail outputs; Steady-state; Voltage control;
Conference_Titel :
Solid-State Circuits Conference, 1995. ESSCIRC '95. Twenty-first European
Conference_Location :
Lille, France
Print_ISBN :
2-86332-180-3
