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
Methods and apparatus for super resolution scanning for CBCT system and cone-beam image reconstruction
Method for optimising the transition from one grade to another
Thienopyridine compounds, and methods of use thereof
Wavelength filter
Dual bus standard switching bus controller
Method and device for processing 3-D image data of a skull
Knowledge management across distributed entity
  Randomly Featured Patents
Electrical switching apparatus, and trip actuator assembly and reset assembly therefor
Electrical receptacle
Sensing device having a large diameter D-shaped optical waveguide
Translation processing using a translation memory
Device for fitting the hands on to a watch movement
Adjustable (D)-port insert header for internal combustion engines
IOL for reducing secondary opacification
Aircraft
Tidal and river turbine
Semiconductor device and system and method of crystal sharing