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https://designers-guide.org/forum/YaBB.pl Modeling >> Behavioral Models >> what could make an integrator? https://designers-guide.org/forum/YaBB.pl?num=1123402728 Message started by svensl on Aug 7th, 2005, 1:18am |
Title: what could make an integrator? Post by svensl on Aug 7th, 2005, 1:18am I was wondering what circuits might act as a continuous time integrator? I do not mean obvious circuits like RC Integrators :). For example, we all know a VCO can be modelled as 1/s. An integrated accelerometer was pointed out to me as well. I am curious what people have come across. Thanks for any feedback. |
Title: Re: what could make an integrator? Post by Geoffrey_Coram on Aug 22nd, 2005, 5:32am If you're integrating something, you need a state variable to keep track of the result, don't you? This means either a capacitor (charge as the state) or an inductor (current as the state). I guess with MEMS you can integrate to get velocity or position. If you are doing microfluidics, you can integrate to get total fluid volume. But if you're really interested in *circuits*, you're pretty much stuck with capacitors and inductors. |
Title: Re: what could make an integrator? Post by svensl on Aug 22nd, 2005, 7:57am Thanks for your feedback. So far the only other thing I have come accross (which is still a circuit, sort of) is a magnetic sensor. There I suppose a magnetometer senses a magnetic field by means of the current it induces in a coil. A voltage is generated which proportional to the rate of change of the flux. So emf=-d(phi)/dt, an integrator. Yay. |
Title: Re: what could make an integrator? Post by jbdavid on Sep 20th, 2005, 10:47am Doesn't EVERY conservative system have an integrator? 8) Position is integral of velocity.. Velocity is integral of force/mass -- same with the angular systems.. --- In plumbing a resevoir (my RO system has one with an air pressure bladder under my sink.. ) Maybe I should write a verilog-A model of that system? :D In Solid-State systems.. The Capacitor has been the fundamental (analog) integrator.. as Inductors are harder to design well in silicon.. with Mems - you could use position and a spring to store the energy.. Jonathan |
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