公开(公告)号：DE3472514D1

公开(公告)日：1988-08-04

申请号：DE3472514

申请日：1984-12-04

Applicant: IBM

Inventor： MACINNIS ALEXANDER GARLAND ,  NUNNERY WILLIAM BURRELL

IPC: H02M3/28 ,  H02M3/337 ,  H02M7/538

Abstract: A method and apparatus for controlling a power supply which includes a power transformer having primary and secondary windings and switching transistors for switching currentthrough the windings. The apparatus includes circuitry for generating a composite signal representative of the flux and magnetizing current (I m ) in the power transformer. The composite signal is correlated with a multiphase clocking signal to generate a pulsewidth modulated (PWM) signal which is used to drive the switching transistors.

公开(公告)号：DE69614441T2

公开(公告)日：2002-05-08

申请号：DE69614441

申请日：1996-04-09

Applicant: IBM

Inventor： CANORA FRANK J ,  NUNNERY WILLIAM BURRELL ,  PONNAPALLI SAILA ,  OAKLEY BRIAN SCOTT ,  OPRYSKO MODEST MICHAEL

IPC: H01Q1/38 ,  H01Q9/04

Abstract: The antenna is a hybrid microstrip and reflector antenna having a planar patch antenna mounted to an upper surface of an insulated planar substrate. The substrate is coupled to a ground plane by means of one or more insulated coupling means (4), so as to form an airgap (10) therebetween. A coaxial cable (13) connectable to a transceiver is coupled to the bottom surface of the ground plane (2) at the outer conductor thereof and the inner conductor is coupled to a feed pin (9) which passes through the ground plane and protrudes through the surface of the patch. The feed pin is secured to the patch by means of soldering.

公开(公告)号：DE69614441D1

公开(公告)日：2001-09-20

申请号：DE69614441

申请日：1996-04-09

Applicant: IBM

Inventor： CANORA FRANK J ,  NUNNERY WILLIAM BURRELL ,  PONNAPALLI SAILA ,  OAKLEY BRIAN SCOTT ,  OPRYSKO MODEST MICHAEL

IPC: H01Q1/38 ,  H01Q9/04

Abstract: The antenna is a hybrid microstrip and reflector antenna having a planar patch antenna mounted to an upper surface of an insulated planar substrate. The substrate is coupled to a ground plane by means of one or more insulated coupling means (4), so as to form an airgap (10) therebetween. A coaxial cable (13) connectable to a transceiver is coupled to the bottom surface of the ground plane (2) at the outer conductor thereof and the inner conductor is coupled to a feed pin (9) which passes through the ground plane and protrudes through the surface of the patch. The feed pin is secured to the patch by means of soldering.

公开(公告)号：DE2809424A1

公开(公告)日：1978-09-21

申请号：DE2809424

申请日：1978-03-04

Applicant: IBM

Inventor： HOFFMAN CHARLES REEVES ,  NUNNERY WILLIAM BURRELL

IPC: H03G11/00