3 ms·
Subthreshold logic is already in use.. check out Ambiq's Apollo ARM MCU. http://ambiqmicro.com/low-power-microcontroller http://ambiqmicro.com/low-power-microc
by jhallenworld 10y ago
Subthreshold logic is already in use.. check out Ambiq's Apollo ARM MCU.
http://ambiqmicro.com/low-power-microcontroller http://ambiqmicro.com/low-power-microcontroller
- acqq 10y agoThanks, here they describe the idea and the problems they faced: http://ambiqmicro.com/spot-platform http://ambiqmicro.com/spot-platform "Operation at such low voltages is problematic due to susceptibility to noise, high sensitivity to temperature, and variability due to process drift. In developing the SPOTTM platform, Ambiq Micro has addressed all of these challenges by redesigning every analog and digital circuit in the chip to adapt for the temperature, voltage, and manufacturing variations that are problematic at these voltage levels."
- jhallenworld 10y agoYeah, they are using the transistors near their highest gain point. It's impressive that they got this to work- If you try this with through-hole transistors, you will definitely be picking up your local AM station.
- acqq 10y agoDo you by any chance know more details? I'd love to read about it.
- jhallenworld 10y agoWell here is their paper: https://www.fujitsu.com/uk/Images/Ambiq_whitepaper.pdf https://www.fujitsu.com/uk/Images/Ambiq_whitepaper.pdf Also always fun to look at their patents, but who knows which ideas are really used in the chip: https://www.google.com/patents/US7009265?dq=ambiq&hl=en&sa=X&ved=0ahUKEwiK_eOwm_fPAhXq5IMKHanxBR0Q6AEISTAG https://www.google.com/patents/US7009265?dq=ambiq&hl=en&sa=X... This thesis seems to have a good overview: http://www.eng.auburn.edu/~agrawvd/THESIS/KIM_S/S.Kim_HonorsThesis_FINAL.pdf http://www.eng.auburn.edu/~agrawvd/THESIS/KIM_S/S.Kim_Honors...