Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Integrated Hall element and amplifier with controlled offset voltage










Image Number 4 for United States Patent #4709214.

An integrated circuit includes an epitaxial layer. In a near central region thereof is formed a symmetrical array of four equal sized Hall cells that are connected in parallel to form one Hall element. A moat surrounds the Hall element consisting of two concentric isolation walls separated by a band of opposite conductivity epitaxial material. The output of the Hall element is connected to the input of an adjacent differential amplifier that has two extraordinarily large amplifying transistors with emitter areas each equal to about a half of a Hall area, for achieving much better control over the relative dimensions of these emitters and thus over the amplifier offset voltage from chip to chip. The emitter resistors are likewise made very wide and both pairs of components are physically arranged to have balanced thermal coupling to the Hall element for further enhancing control of offset voltage.








 
 
  Recently Added Patents
Wallet
Control device of hybrid vehicle
Dual source mass spectrometry system
Baseball player stationery tab
Case for electronic device
Launch cable case
Compounds and compositions for treating chemical warfare agent-induced injuries
  Randomly Featured Patents
Low duty cycle network controller
System and method of configuring a network element
Spine stretch machine
Device for trapping insects
Health monitoring and diagnostic device and network-based health assessment and medical records maintenance system
Expandable envelope construction
Linear high gain sampling amplifier
Light emitting diode-light guide coupling apparatus
Microstrip antenna with integral low-noise amplifier for use in global positioning system (GPS) receivers
Finished part collection system for automated turret lathe