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
Apparatus and method for phase synchronization in radio frequency transmitters
Fuel cell support structure
Cycloalkylamine substituted isoquinoline derivatives
Display device and projector
Protecting a gaming machine from rogue code
Case for electronic device
Wheel
  Randomly Featured Patents
Computer system capable of interruption using special protection code for write interruption region of memory device
Poultry cone cleaning device
Faceplate and latch for a line card
Cardiac valve prosthesis
Library of hard disk drives with transparent emulating interface
OFDM equalizer filter with shared multiplier
Image processing system for compressing image data including binary image data and continuous tone image data by a sub-band transform method with a high-compression rate
Sewing machine having the needle holder magazine with automatic coupling and decoupling of thread containing needles and needle holders
Peracid granules containing citric acid monohydrate for improved dissolution rates
Simultaneous magnetic resonance imaging of multiple human organs