Abstract: Examples of the present disclosure provide memory devices and an operation method thereof. The memory device includes: a memory cell array; a control logic circuit coupled with the memory cell array and configured to receive a command address signal, output a first control signal at a first time instant, and output a second control signal at a second time instant, wherein the first time instant is different from the second time instant; and a clock generation circuit configured to receive a first clock signal, the first control signal and the second control signal, be pre-charged according to the first control signal, and perform frequency division processing on the first clock signal according to the second control signal to output a second clock signal, wherein the first clock signal is different from the second clock signal.

Abstract: Examples of the present disclosure include a memory device, a control method thereof, and a memory system. The memory device includes a memory array and a peripheral circuit coupled to the memory array. The memory array includes memory rows each including memory cells coupled to one word line. The peripheral circuit is configured to determine, in response to a read command, whether address information same as first address information of a first memory row corresponding to the read command exists in a refresh table. The refresh table stores pieces of address information each corresponding to one of the memory rows. The peripheral circuit is configured to delete the address information same as the first address information from the refresh table in response to the address information same as the first address information existing in the refresh table.

Abstract: A pre-distortion processing device, a signal transmission system, and a pre-distortion processing method are provided. The pre-distortion processing device comprises a pre-distortion unit, a transmission unit and a coupling unit which are sequentially connected. A feedback path of the coupling unit is connected to the pre-distortion unit. The pre-distortion processing device further comprises a generation unit and a combiner unit. The generation unit is used to generate a non-hopping wideband signal having a bandwidth greater than a bandwidth of a system input signal. A first input terminal of the combiner unit is connected to an output terminal of the generation unit. A second input terminal of the combiner unit is used to receive the system input signal. An output terminal of the combiner unit is connected to an input terminal of the pre-distortion unit.

Abstract: Methods and apparatus for designing and measuring a cell-electrode impedance sensor to detect chemical and biological samples, including biological cells. The method of designing a cell-electrode impedance sensor comprises: determining a cell free cell-electrode impedance and a cell-covered cell-electrode impedance; obtaining a sensor sensitivity of the cell-electrode impedance measurement system; and choosing one or more design parameters of the cell-electrode impedance sensor to maximize the sensor sensitivity. When the frequency of AC signal between electrodes ranges from 10 kHz to 40 kHz, the sensitivity of the sensor is maximized.