Abstract: The present invention provides a refresh clock generator which optimally controls a period of a refresh clock signal according to temperature variation and outputs the refresh clock signal. The refresh clock generator includes a bias voltage generating unit for generating first and second bias voltages in response to a temperature variation and a clock generator for generating a refresh clock signal having a frequency which is controlled or adjusted based on the first and second bias voltages, wherein the first bias voltage is varied in proportion to the temperature variation; the second bias voltage is varied in inverse proportion to the temperature variation; and the frequency of the refresh clock signal is varied in proportion to the temperature variation.

Abstract: The present invention provides a refresh clock generator which optimally controls a period of a refresh clock signal according to temperature variation and outputs the refresh clock signal. The refresh clock generator includes a bias voltage generating unit for generating first and second bias voltages in response to a temperature variation and a clock generator for generating a refresh clock signal having a frequency which is controlled or adjusted based on the first and second bias voltages, wherein the first bias voltage is varied in proportion to the temperature variation; the second bias voltage is varied in inverse proportion to the temperature variation; and the frequency of the refresh clock signal is varied in proportion to the temperature variation.

Abstract: A clock generator generating a refresh clock signal used in a refresh execution of a semiconductor includes a first MOS transistor diode-connected for outputting a first bias voltage, a source of the first MOS transistor being connected to a supply voltage; a second MOS transistor diode-connected for outputting a second bias voltage, a source of the second MOS transistor being connected to ground voltage; a bias current control means having a predetermined number of serial-connected diodes for serving as a resistance in inverse proportion to a temperature, wherein the bias current control means is coupled between the first MOS transistor and the second MOS transistor to control the first and second bias voltages by using the resistance; and a refresh clock generator generating the refresh clock signal having the frequency which is controlled or adjusted based on the first and second bias voltages.