Transmitting device using calibration circuit, semiconductor apparatus and system including the same
AssigneeSK hynix Inc.
InventorHae Kang JUNG
Life of this patent
Estimating the term…
Abstract
A transmitting device includes a calibration circuit and a transmission circuit. The calibration circuit generates calibration codes by performing a calibration operation. The calibration circuit also generates compensation calibration codes by increasing or decreasing values of the calibration codes according to whether a number of codes among the calibration codes having a predetermined level is greater than or equal to a threshold value. The transmission circuit drives a signal transmission line based on an input signal and the compensation calibration codes.
Claims18
A transmitting device comprising:
- a calibration circuit configured to generate calibration codes by performing a calibration operation and configured to generate compensation calibration codes by increasing or decreasing values of the calibration codes based on whether a number of codes among the calibration codes having a predetermined level is greater than or equal to a threshold value, such that a number of codes among the compensation calibration codes having the predetermined level is less than the threshold value;
- and
- a transmission circuit configured to drive a signal transmission line based on an input signal and the compensation calibration codes.
A transmitting device comprising:
- a calibration code generator coupled to an external reference resistance and configured to generate a calibration codes;
- and
- a calibration code converter configured to generate a converted calibration codes from the calibration codes and configured to generate a compensation calibration codes from either the calibration codes or the converted calibration codes based on an operation mode signal;
- and
- a transmission circuit configured to drive a signal transmission line based on an input signal and the compensation calibration codes.
A transmitting device comprising:
- a calibration circuit configured to generate calibration codes by performing a calibration operation and configured to generate compensation calibration codes by changing the calibration codes when a number of codes among the calibration codes having a predetermined level is greater than or equal to a threshold value, such that a number of codes among the compensation calibration codes having the predetermined level is less than the threshold value;
- and
- a transmission circuit configured to drive a signal transmission line based on an input signal and the compensation calibration codes, wherein the transmission circuit comprises a main driver having a pull-up resistance and a pull-down resistance set based on the compensation calibration codes.
Dependencies are inferred from the claim text.