Semiconductor apparatus with calibration circuit and system including the same
AssigneeSK hynix Inc.
InventorTae Jin Hwang
Life of this patent
Estimating the term…
Abstract
A calibration circuit of a semiconductor apparatus may include: a reference voltage generator suitable for generating first and second pull-up reference voltages based on a pull-up control signal, and generating first and second pull-down reference voltages based on a pull-down control signal; and a calibrator suitable for generating a pull-up resistor code corresponding to an external reference resistor based on the first and second pull-up reference voltages, and generating a pull-down resistor code corresponding to the external reference resistor based on the first and second pull-down reference voltages and the pull-up resistor code.
Claims19
A semiconductor apparatus, comprising:
- a reference voltage generator suitable for generating first and second pull-up reference voltages based on a pull-up control signal, and generating first and second pull-down reference voltages based on a pull-down control signal;
- and
- a calibrator suitable for generating a pull-up resistor code corresponding to an external reference resistor based on the first and second pull-up reference voltages, and generating a pull-down resistor code corresponding to the external reference resistor based on the first and second pull-down reference voltages and the pull-up resistor code.
A system comprising:
- a master device;
- and
- a slave device suitable for communicating with the master device through a signal bus,
- wherein the slave device comprises a calibration circuit for setting a resistor value corresponding to an external reference resistor, and
- the calibration circuit comprises:
- a reference voltage generator suitable for generating first and second pull-up reference voltages based on a pull-up control signal, and generating first and second pull-down reference voltages based on a pull-down control signal;
- and
- a calibrator suitable for generating a pull-up resistor code corresponding to the external reference resistor based on the first and second pull-up reference voltages, and generating a pull-down resistor code corresponding to the external reference resistor based on the first and second pull-up reference voltages and the pull-up resistor code.
Dependencies are inferred from the claim text.