Recent content by JustinH

Hmm, slight problem, I've been looking at analog switches, and they seem to fit the bill pretty well except the ones I've looked at have maximum voltage swings across the in and out terminals of around 5V. I need something that can handle voltage swings around 40V. I'll keep looking, but let...

Thanks for the help, analog switches look promising. Justin

To be honest, finding part models in pspice is more than a hassle. Are you saying that I should use a relay? I forgot to mention, the switch that I use has to have low power dissipation at the currents I'm working with. Ideally the power dissipation should be below 10mW, not sure if this is...

Hi, I'm designing a circuit in pspice and having some trouble with the switching. In my circuit in pspice I'm using an ideal voltage controlled switch model "S" and using a vpulse to control it. My current through the switch needs to be bidirectional, and maxing around 80mA with an average...

Basically when the high voltage is applied across the capacitor, it diffuses the laser light that is reflected back. When less than approximately 55V, the capacitor acts like a mirror. The method of modulation is rather open. Right now I'm working with something that will return to zero after...

The driver circuit is supposed to modulate a laser using a MEMS device that is comparable to a 500 pF cap. The device is essentially a capacitor. Any ideas?

Hi, It's been a while, but I'm still working on this project. Here's what I'm thinking so far. Basically starting with a low voltage battery, then using a DC-DC converter to get approximately 40V and 80V. Some of the properties have changed. For example, now it's a 500pF capacitor switching...

Sorry about that, of course I meant series :P. The actual load is a device that I'm approximating as a 1 nF cap. By the nature of this device, I can't switch the load "cap" back and forth, basically I have to charge and discharge the load at about 50k. I'm wondering if there's a way to store...

Hi all, I am trying to design a low power dissipation driver circuit. Basically the circuit gets a 1v digital signal which tells it whether to apply a separate DC power source of 100v across a 1nF capacitor. This digital signal is modulated at about 100kHz and will change at about 50kHz...