Jul 7, 2005 #1 C crystalc Newbie level 5 Joined Apr 21, 2004 Messages 10 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 67 I want to get a lower voltage than input, how to do the level shift? For example: the input voltage is about 5v, but I want to use it at 2.5v. thanks.
I want to get a lower voltage than input, how to do the level shift? For example: the input voltage is about 5v, but I want to use it at 2.5v. thanks.
Jul 7, 2005 #2 I IanP Advanced Member level 7 Joined Oct 5, 2004 Messages 7,929 Helped 2,311 Reputation 4,624 Reaction score 531 Trophy points 1,393 Location West Coast Activity points 66,416 You can use voltage divider (by 2) build of 2 identical resistors .. the values depend on input and output imedances of both stages .. Regards, IanP
You can use voltage divider (by 2) build of 2 identical resistors .. the values depend on input and output imedances of both stages .. Regards, IanP
Jul 7, 2005 #3 R rommelm Member level 1 Joined Sep 2, 2004 Messages 35 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 373 You could use many level shifter available in the market. The question that will matter is: 1. What frequency 2. What current load try the AVC logic family of TI https://focus-webapps.ti.com/genera...3260327&numRecords=25&submit.x=34&submit.y=11 Added after 1 minutes: If you care for DC only, I suggest that you use DC-DC.
You could use many level shifter available in the market. The question that will matter is: 1. What frequency 2. What current load try the AVC logic family of TI https://focus-webapps.ti.com/genera...3260327&numRecords=25&submit.x=34&submit.y=11 Added after 1 minutes: If you care for DC only, I suggest that you use DC-DC.
Jul 7, 2005 #4 E extraord Member level 4 Joined Mar 5, 2004 Messages 68 Helped 8 Reputation 16 Reaction score 2 Trophy points 1,288 Activity points 553 I think just two inverter is ok. the first inverter must use the transistor which can use under 5V gate voltage. and the vdd of both should be 2.5v.
I think just two inverter is ok. the first inverter must use the transistor which can use under 5V gate voltage. and the vdd of both should be 2.5v.
Aug 31, 2005 #5 M mpig09 Full Member level 4 Joined Aug 26, 2005 Messages 232 Helped 8 Reputation 16 Reaction score 2 Trophy points 1,298 Location Taipei Activity points 2,810 You can use buck converter, then the duty is 50%.
Sep 2, 2005 #6 W wjx197733 Member level 2 Joined Sep 21, 2004 Messages 53 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 476 use bipolar, and common collector
Sep 4, 2005 #7 J jiangwp Guest For analog design: If the process is cmos , i think the soure follows can be used. If the bipolar process, the emitter follows can be used. For digital design: The 2.5v power supply has to be need, and a cross-coupling feedback is to supply what you want.
For analog design: If the process is cmos , i think the soure follows can be used. If the bipolar process, the emitter follows can be used. For digital design: The 2.5v power supply has to be need, and a cross-coupling feedback is to supply what you want.
Sep 4, 2005 #8 smxx Full Member level 4 Joined Aug 18, 2005 Messages 193 Helped 25 Reputation 50 Reaction score 13 Trophy points 1,298 Location iran(ahwaz) Activity points 2,546 hi I think that the voltage divider is load sensitive. use an OP-AMP whit proper gain (k);
Sep 11, 2005 #9 L limingchou Member level 3 Joined Aug 24, 2005 Messages 57 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 1,711 you can use the linear voltage regulator. its performance is very good!