Texas Instruments Corporation

The Chamberlain Group, Inc.

Nuvatec, Inc.

John Victor Moravec

Gene A Frantz

Masashi Hashimoto

Jean-Pierre Dolait

James Joseph Fitzgibbon

Bradley Farris

Karl M Guttag

Raymond Pinkham

Mark F Novak

Bradford Lowell Farris

William H Slavik

Robert C Thaden

Loren E Doppelt

Jeffrey C Bond

William P Carlson

Michael J McGowan

Jean P Dolait

A memory circuit () having features specifically adapted to permit the memory circuit () to serve as a video frame memory is disclosed. The memory circuit () contains a dynamic random access memory array () with buffers () on input and output data ports () thereof to permit asynchronous read, write and refresh accesses to the memory array (). The memory circuit () is accessed both serially and randomly. An address generator () contains an address buffer register () which stores a random access address and an address sequencer () which provides a stream of addresses to the memory array (). An initial address for the stream of addresses is the random access address stored in the address buffer register ().

SDRAM with command decoder coupled to address registers

SDRAM with command decoder, address registers, multiplexer, and sequencer

A movable barrier operator includes an automatic force incrementing system for adjusting the maximal opening and closing force to be placed upon the movable barrier during a learn operation. The movable barrier operator also includes a control unit with an ambient temperature detector which controls the motor to move at a specified force and is used to inhibit motor operation depending on the motor temperature derived from the temperatur detected by the temperature detector.

Movable barrier operator having force and position learning capability

A memory circuit ( ) having features specifically adapted to permit the memory circuit ( ) to serve as a video frame memory is disclosed. The memory circuit ( ) contains a dynamic random access memory array ( ) with buffers ( ) on input and output data ports ( ) thereof to permit asynchronous read, write and refresh accesses to the memory array ( ). The memory circuit ( ) is accessed both serially and randomly. An address generator ( ) contains an address buffer register ( ) which stores a random access address and an address sequencer ( ) which provides a stream of addresses to the memory array ( ). An initial address for the stream of addresses is the random access address stored in the address buffer register ( ).

Process of operating a DRAM system

Synchronous DRAM with control data buffer

Process of using a DRAM with address control data

Synchronous data system with control data buffer

Memory device for transferring streams of data

Process for controlling reading data from a DRAM array

System with control data buffer for transferring streams of data

Synchronous DRAM system with control data

A memory circuit ( ) having features specifically adapted to permit the memory circuit ( ) to serve as a video frame memory is disclosed. The memory circuit ( ) contains a dynamic random access memory array ( ) with buffers ( ) on input and output data ports ( ) thereof to permit asynchronous read, write and refresh accesses to the memory array ( ). The memory circuit ( ) is accessed both serially and randomly. An address generator ( ) contains an address buffer register ( ) which stores a random access address and an address sequencer ( ) which provides a stream of addresses to the memory array ( ). An initial address for the stream of the addresses is the random access address stored in the address buffer register ( ).

Synchronous data transfer system

Synchronous DRAM System with control data

A movable barrier operator includes a wall control switch module having a learn switch thereon. The switch module is connectable to a control unit positioned in a head of a garage movable barrier operator. The head unit also contains an electric motor which is connected to a transmission for opening and closing a movable barrier such as a garage door. The switch module includes a plurality of switches coupled to capacitors which, when closed, have varying charge and discharge times to enable which switch has been closed. The control unit includes an automatic force incrementing system for adjusting the maximal opening and closing force to be placed upon the movable barrier during a learn operation. Likewise, end of travel limits can also be set during a learn operation upon installation of the unit. The movable barrier operator also includes an ambient temperature sensor which is used to derive a motor temperature signal, which motor temperature signal is measured and is used to inhibit motor operation when further motor operation exceeds or is about to exceed set point temperature limits.

Growing community of inventors

Willow Springs, IL, United States of America

John Victor Moravec