noleeach
Newbie level 1
Hi
I need advices on noise calculation of ADC.
I'm designing a single-slope serial ADC. A two-stage comparator compares Vin with Vramp and drives an NAND-gate. The output of the NAND gate then activates a counter. The counter operates at much higher frequency than the -3dB freq of the compartor.
I want to calculate the thermal noise of this ADC. Does small-signal concept still apply or a transient noise analysis should be used in this case?
If small-signal concept can be used, what range of frequency should i need to integrate to compute the input-reffered noise? My simulator showed that the input-reffered noise increased forever whenever i widened the integration range.
Thankyou.
I need advices on noise calculation of ADC.
I'm designing a single-slope serial ADC. A two-stage comparator compares Vin with Vramp and drives an NAND-gate. The output of the NAND gate then activates a counter. The counter operates at much higher frequency than the -3dB freq of the compartor.
I want to calculate the thermal noise of this ADC. Does small-signal concept still apply or a transient noise analysis should be used in this case?
If small-signal concept can be used, what range of frequency should i need to integrate to compute the input-reffered noise? My simulator showed that the input-reffered noise increased forever whenever i widened the integration range.
Thankyou.