Data output circuit with reduced output noise
April 26, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesOutput buffer tri-state noise reduction circuit CMOS inverter having temperature and supply voltage variation compensation Output buffer having capacitive drive shunt for reduced noise Controlled slew rate buffer Programmable output drive circuit Power supply start up circuit for dynamic random access memory Voltage regulator for programming non-volatile and electrically programmable memory cells Semiconductor integrated circuit device with data output circuit Semiconductor memory device with a voltage down converter stably generating an internal down-converted voltage Patent #: 5689460 InventorsApplicationNo. 298968 filed on 04/26/1999US Classes:327/112, Push-pull327/540, With voltage source regulating327/541With field-effect transistorExaminersPrimary: Lam, Tuan T.Attorney, Agent or FirmInternational ClassG05F 001/10Foreign Application Priority Data1994-11-15 JPAbstractA data output drive transistor is rendered conductive when the potential of an internal node attains an H level, whereby an output node is discharged to the level of ground potential. When the drive transistor is turned on, the output node is discharged to the level of ground potential at high speed. This drive transistor is turned on for a predetermined time period when output of a high level data is completed, whereby the output node is discharged to the level of the ground potential for a predetermined time period. As a result, the potential of the output node is lowered from a high level to an intermediate level, so that the amplitude of a subsequent output signal is reduced. An output circuit that can effectively prevent generation of ringing with no increase in the access time is provided. A countermeasure is provided to suppress a ringing at output node which drives the output node at high speed when the output node potential attains a potential at which no ringing is caused. A stable output signal is provided at high speed. | |
