Comments on: Design a Differential Amplifier the Easy Way with Mathcad http://masteringelectronicsdesign.com/design-a-differential-amplifier-the-easy-way-with-mathcad/ Electronics Design and Modeling with Emphasis on Analog Design Wed, 21 Jul 2010 05:50:16 +0000 http://wordpress.org/?v=2.9 hourly 1 By: Adrian S. Nastase http://masteringelectronicsdesign.com/design-a-differential-amplifier-the-easy-way-with-mathcad/#comment-592 Adrian S. Nastase Mon, 08 Feb 2010 07:52:14 +0000 http://masteringelectronicsdesign.com/?p=964#comment-592 Mathcad is owned and distributed by PTC. Here is the link: <a href="http://www.ptc.com/products/mathcad/" rel="nofollow"> http://www.ptc.com/products/mathcad/</a> They have a trial version and also a student version. I am not aware of any Linux version. Mathcad is owned and distributed by PTC. Here is the link:

http://www.ptc.com/products/mathcad/

They have a trial version and also a student version. I am not aware of any Linux version.

]]> By: arun http://masteringelectronicsdesign.com/design-a-differential-amplifier-the-easy-way-with-mathcad/#comment-591 arun Mon, 08 Feb 2010 04:21:38 +0000 http://masteringelectronicsdesign.com/?p=964#comment-591 where can i get Mathcad.Is there a Mathcad equivalent that works on Linux. where can i get Mathcad.Is there a Mathcad equivalent that works on Linux.

]]> By: Adrian S. Nastase http://masteringelectronicsdesign.com/design-a-differential-amplifier-the-easy-way-with-mathcad/#comment-370 Adrian S. Nastase Sat, 28 Nov 2009 23:43:57 +0000 http://masteringelectronicsdesign.com/?p=964#comment-370 I used Mathcad 2001. However, any version between 2001 and Mathcad 14 would work the same. I used Mathcad 2001. However, any version between 2001 and Mathcad 14 would work the same.

]]> By: Mathcad-user http://masteringelectronicsdesign.com/design-a-differential-amplifier-the-easy-way-with-mathcad/#comment-368 Mathcad-user Sat, 28 Nov 2009 07:44:48 +0000 http://masteringelectronicsdesign.com/?p=964#comment-368 Which Mathcad version did you use? Which Mathcad version did you use?

]]> By: Adrian S. Nastase http://masteringelectronicsdesign.com/design-a-differential-amplifier-the-easy-way-with-mathcad/#comment-362 Adrian S. Nastase Wed, 25 Nov 2009 06:17:14 +0000 http://masteringelectronicsdesign.com/?p=964#comment-362 A negative resistance is theoretical. The system of equations has a solution, but the solution is negative. It means that your design needs an extra source of energy in order to output the voltage range you need for the given input range. In practice, you have two choices: change the reference voltage, or change the amplifier topology. A lot of times it is easier to change the reference value than to change the op amp configuration. This method is great because it lets you find the correct resistor values by trying different voltage references. A negative resistance is theoretical. The system of equations has a solution, but the solution is negative. It means that your design needs an extra source of energy in order to output the voltage range you need for the given input range. In practice, you have two choices: change the reference voltage, or change the amplifier topology. A lot of times it is easier to change the reference value than to change the op amp configuration. This method is great because it lets you find the correct resistor values by trying different voltage references.

]]> By: jeffhill http://masteringelectronicsdesign.com/design-a-differential-amplifier-the-easy-way-with-mathcad/#comment-358 jeffhill Sun, 22 Nov 2009 05:25:36 +0000 http://masteringelectronicsdesign.com/?p=964#comment-358 I applied this method and it works great. For some input/output ranges I am getting a negative value for R1 or R4. Why is that? I applied this method and it works great. For some input/output ranges I am getting a negative value for R1 or R4. Why is that?

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