Optimal Design Of Timing Module Based On EEPROM

In various applications of EEPROM,the speed of its read and write functions is an important parameter indicator,so oscillators are widely used as on-chip and off-chip clock sources for control equipment.With the continuous development of integrated circuit technology,higher and higher requirements are put forward for the performance,stability,power consumption,area and other aspects of oscillators,which puts forward higher challenges for the design of oscillators.More and more researchers are now trying to design new circuit structures,hoping to find a balance between the performance characteristics of different oscillators.However,the performance of conventional RC oscillators is affected by factors such as temperature and supply voltage,which can cause their operating frequency to become unstable,such as sometimes tripping.In recent years,there has been a lot of research on RC oscillators,all of which are aimed at reducing the power consumption of RC oscillators and improving their frequency stability.With the improvement of chip integration and the expansion of application range,the high accuracy and good stability of the on-chip clock are very important.However,with the rapid development of smart devices,the requirements for low power consumption and low cost of EEPROM chips are increasing,so the integration of on-chip clocks needs to consider the cost issue.Although crystal oscillators have high accuracy and stability,they are not suitable for on-chip integration,so RC oscillators are preferred.This article aims to design a low-voltage,low-power,low-power RC oscillator frequency selection circuit with bandgap reference based on existing EEPROM chips.In this paper,using ASMC 0.15μm process,based on the Cadence Virtuoso platform,a low-voltage and low-power adjustable RC relaxation oscillator is designed,and the functional simulation and layout design of the oscillator are completed,and the temperature range changes from-40°C to 135°C at the TT process angle.The oscillator can operate at a minimum operating voltage of 1.3V,and with a supply voltage of 5V,the frequency of the circuit can be adjusted from 4MHz to 16 MHz,the temperature coefficient is 9.516ppm/°C,and the minimum power consumption is only 39μW.In terms of layout design,the final area is 171.2μm*170.6μm,and DRC and LVS are checked.In summary,the EEPROM-based timing module circuit designed in this paper can still have stable frequency output under the influence of process,temperature,and power supply voltage.