afaik it's not possible to set the 'Independent V source' alone to create a full wave rectified signal. It would be tidy to know for sure.
Last time I used 2 out of phase generators and 2 ideal diodes. Simpler?
The purpose is to have a simple model of a bridge rectifier on the mains.
Just ground one leg of the "Independent V source' through a very, very large resistance. The simulator is looking for a path to ground so that it can "anchor" its calculations.
V*sgn(V)
See p43 of the LTspice manual. ...Jim Thompson
-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
Ah, don't feel bad. Last night I was dabbling around with some diode strings in a circuit and I decided to do a jumper around them instead of editing them out of the circuit. The jumper works fine how ever, when you click on the diode string inside the jumper string, you get a nice graph of loaded noise!.
I guess some one could of thought the jumper wire may act as a antenna and the diodes were acting like detectors. That is the only thing I can come up with why LtSPice would even bother processing them.
Jamie
Version 4 SHEET 1 880 680 WIRE 160 96 -16 96 WIRE -16 128 -16 96 WIRE -16 224 -16 208 FLAG -16 224 0 SYMBOL bv -16 112 R0 SYMATTR InstName B1 SYMATTR Value V=170*abs(sin (377*time)) TEXT -50 248 Left 2 !.tran 0 .1 0 10u
My favorite is leaving voltage sources loaded with nothing. Just grounded. Often I have many unused voltage sources on the schematic as if I had many power supplies adjusted on the bench and connected to whichever needed. 'What was that last voltage I tried?'
Ah.. Using the arbitrary behavioral voltage source.
I would have tried degrees first.
360/period = 21600 degrees/s.But function is set for radians.
2*pi/period = 377 radians/s.
Maybe it's cause it's late but I'm trying to make sense of that.
Will look into that. Thks.
mains.
Perhaps it was my interpretation of the problem you were experiencing that is at fault, and not your ability to comprehend my reply :-)
When I read your post I thought the issue was with the simulator software not liking a transformer primary circuit 'floating' without a path to ground (Typically one would like to make the gound node coincide with the negative DC output lead).
But now I see that really you just want to have a voltage source that produces a full-wave rectified waveform.
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