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Ask help from generaing a square wave by another square wave
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bhl3302



Joined: 30 Sep 2008
Posts: 24
Post09 Feb 2009 4:33   

Ask help from generaing a square wave by another square wave
Hi guys, could you help me to solve this problem? I have a square wave whose amplitude is 3V, and I want to use a 28V DC supply and some resistors, could you tell me how can I use the 3V input square wave to generate a 28V sqaure wave just using the resistors? I have tried to use the pull-up resistor but it is not OK. The detailed picture is in the attachment! Thank you so much!
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cameo_2007



Joined: 15 Mar 2007
Posts: 439
Helped: 17
Location: 13.04°N80.17°E
Post09 Feb 2009 5:33   

Ask help from generaing a square wave by another square wave
is a tranistor ok?
then how about switching the voltage level useing a transitor.?
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CMOS



Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA
Post09 Feb 2009 5:57   

Re: Ask help from generaing a square wave by another square
Use 2 cascaded transistors switches as shown in attached schematic.
Transistors can be any general purpose NPN like BC547.

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bhl3302



Joined: 30 Sep 2008
Posts: 24
Post09 Feb 2009 6:18   

Re: Ask help from generaing a square wave by another square
cameo_2007 wrote:
is a tranistor ok?
then how about switching the voltage level useing a transitor.?


Thank you man, you really help me!

Added after 18 seconds:

CMOS wrote:
Use 2 cascaded transistors switches as shown in attached schematic.
Transistors can be any general purpose NPN like BC547.


Thank you man, you really help me!
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