Does anyone know of a simple detailed schematic of a phase splitter. I'm looking for something that is transistor based or IC, not tube based. Thanks for any info.

Tony

Hi, here you go:

That's great, thank you. Any recommendations for placing some pots in the single transistor schematic to adjust the degree of shift for both outputs?

it`s not a phase shifting going on here,
but a phase reversing (flipping).
there`s only 0 and 180 degrees available.

But: if you insert a series R/C combination
between the 2 outputs, you get a variable
phase-shifted output at the node of the R & C,
which varies by altering the value of the R (or C).

Yup, as puretube said, you can convert both outputs into ONE output with variable phase.  This is done on the old univibe.  I have a schematic where 4 transistor-based phase shift stages are used in series.  On this schematic two transistors in darlington arrangement are used per each stage, which today you can replace by a single high-gain device like the 2N5088, as shown on my schematic.

If you want two outputs with different and adjustable phases you may consider using two circuits in parallel with the mod indicated by purteube.  Be aware that with said circuit phase shift varies with frequiency, i.e. if you have 90º at 1 kHz it will be less at 500 Hz and more at 2 kHz.  Also, for a single stage phase shift is always between 0 and 180º.

There are other circuits (used in communication equipment) that generate  two outputs which maintain a constant phase shift (usually 90º) across a wide range of frequencies, like from 100 Hz up to 10 kHz.

Maybe you could tell us what you need the circuit for :?:

Thanks for the info, I appreciate it. I was experimenting with the idea of using the phase splitter with a passive balanced ring modulator. The idea being: one input source split into 2 and that goes into the the ring mod. But I would need to be able to adjust the frequency of at least one of the outputs on the phase splitter.

Is there a way I can alter the frequency of one of the outputs on the phase splitter? What about a frequency doubler hooked up to one phase output?

Thanks,
Tony

I'm using a transistor amp with a transformer coupled at the collector. It's like the trans schem that was posted above except the emitter is decoupled.

This way there is amplification and the transformer is doing the phase splitting.

some weeks ago i asked for a way to make a simple vibrato circuit... i was given some links with phase shifting pedals technology, but i couldn't get much with it.

i may be wrong but making two of these circuits with variable phases would make a subtle phaser, right?

"if you insert a series R/C combination"
with what values?

now, how could these phase shifter could be turn into a vibrato effect?
(i think attaching a LDR+LED based LFO to the resistor between the outputs would do something. but thats as far as i can go... :?)

i'd build the vibrato effects that are on the net, but a lot of they have components i can't get my hands on

2 of the mentioned shifters in series make a nice  vibrato by themselves;

if you combine the vibrated signal with the original (dry) signal,
you get phasing;

for a more than subtle phasing, you should use 4 shifters in series...

try between 2n2 and 22n, when your variable resistor goes between 5k and 1M (LDR?);

cool!!
that's so nice to hear
i'll try it

thanks!

awww... its sad, but i think i didn't understand too well what to do...

was looking for some background in phasing, and i did hit this:
http://www.tpub.com/content/neets/14184/css/14184_114.htm

am i wrong, or this phase shifter really needs only ONE input, and not two phase inverted inputs??
it's confusing me

now, stm talked about placing both inverters in parallel, puretube said in series.... for what are these two different settings?

apparently i can't do a vibrato circuit with only one phase splitter, but why?

so the thing must be like: adding a resistor/capacitor in series to connect both outputs, then using the central node as single output. values should be, say, 22n and 1M, right?? ...if i can make periodically variable the resistor (LFO), what am i getting there? ..why do i need two splitters, and how are they attached together? do they use the same lfo for periodic variation??

i tried to do it... messed with R's and C's, put the inverters in series, and didn't got anything close to any vibrato or phasing  :roll:

that kind of "single-ended" (asymmetrical) phase-shifter
doesn`t have a constant amplitude;
- when the R is close to zero, the output amplitude is also close to zero -