gpuc
Newbie
Hello everybody, I'm new and this is my first thread.
I would like to ask how to determine the temperature range of a integrated oscilaltor on Virtuoso IC 6.1.7.
I'm designing a digitally controlled oscillator (DCO), controlled by 11 bits, in the frequency range between 1.5 GHz and 2.5 GHz.
The method I'm usying is this: I make PVT simulations (using ADEXL) to see wheter the circuit is able to work properly in the range of temperature between 0 °C and 125 °C. With "work properly" I mean to verify that the performance parameters of the oscillator (like phase noise, jitter, voltage swing and dissipated power) are still good despite the process, voltage, temperature corner, but also for different frequencies.
Moreover, I verify that the system is able to start the oscillation for different corners and frequencies. The hardest is the one at T=0°C, VDD reduced of the 10%, the technology corner is the slow one and the selected frequency is the slowest. In this condition the loop gain is reduced and the system will take some more time to start oscillating.
I do this for pre-layout simulations and then for post-layout simulations: if the system can start the oscillation and the performance parameters are still good, i can conclude that the system is able to work in the range between 0°C and 125°C.
Do you think this is good? I haven't find anything online that could explain a project flow to determine the temperature range of an IC.
I would like to ask how to determine the temperature range of a integrated oscilaltor on Virtuoso IC 6.1.7.
I'm designing a digitally controlled oscillator (DCO), controlled by 11 bits, in the frequency range between 1.5 GHz and 2.5 GHz.
The method I'm usying is this: I make PVT simulations (using ADEXL) to see wheter the circuit is able to work properly in the range of temperature between 0 °C and 125 °C. With "work properly" I mean to verify that the performance parameters of the oscillator (like phase noise, jitter, voltage swing and dissipated power) are still good despite the process, voltage, temperature corner, but also for different frequencies.
Moreover, I verify that the system is able to start the oscillation for different corners and frequencies. The hardest is the one at T=0°C, VDD reduced of the 10%, the technology corner is the slow one and the selected frequency is the slowest. In this condition the loop gain is reduced and the system will take some more time to start oscillating.
I do this for pre-layout simulations and then for post-layout simulations: if the system can start the oscillation and the performance parameters are still good, i can conclude that the system is able to work in the range between 0°C and 125°C.
Do you think this is good? I haven't find anything online that could explain a project flow to determine the temperature range of an IC.
