Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Semiconductor integrated circuit using standardized analog cells










Image Number 7 for United States Patent #5801407.

An analog-circuit block, which is fabricated on a chip of a semiconductor integrated circuit, is configured by a plurality of analog cells each having a desired function such as the function of an operational amplifier. The analog cells are standardized with respect to the height thereof. Two power-source wires are provided respectively in an upper-end section and a lower-end section of the analog-circuit block, so that they are commonly used by the analog cells. In the analog cell, input/output wires are placed in a direction perpendicular to the power-source wires. For example, two input wires are provided to input signals for two inputs of an operational amplifier while one output wire is provided to provide an output signal, wherein one of the two input wires is partially connected to the output wire. Further, it is possible to provide a dummy wire which is placed in parallel with the output wire, wherein a midpoint of the output wire is connected to a midpoint of the dummy wire. Because of the provision of the dummy wire, it is possible to suppress interference between circuits. Moreover, the analog cell is surrounded by a guard-ring diffusion layer; and there are provided guard-ring wires to contact with the guard-ring diffusion layer, so that propagation of noise is avoided.








 
 
  Recently Added Patents
Buffer compositions
System and method for hedging risks in commercial leases
Dynamic playbook: experimentation platform for social networks
Control apparatus for internal combustion engine
Remotely managed device
L2 method for partial VLAN service migration
Object-based 3-dimensional audio service system using preset audio scenes
  Randomly Featured Patents
Video recording and reproducing system
Sunlight rechargeable storage cell
Interactive print job display system and method
Badge
White balance including means for preventing colored object from disturbing the balance
Label printer apparatus
Method of producing a hot gas component of a turbomachine including an embedded channel
Drive system for high inertia load
Adjusting device performance based on processing profiles
Device and method for outloading bulk materials