Convert Audio Signal to Four Phase

=46or single of a few simultaneous sine waves check the LTspice circuit i posted. I just got the multi frequency square wave response simulation going, it seems to be taking some time. If it is useful i will post it.

?-)

nal

0

g a

ad

an

and.

t

ea,

ell

s of

y s

Check out the line (link) of text:

Phase-Shift Network Analysis and Optimization or Download PDF file

@

-------------------------------------------- Also, Chris Trask Phase Splitter References:

Albersheim, W. and F. Shirley, "Computation Methods for Broad-Band 90 Degree Phase Difference Networks," IEEE Transactions on Circuit Theory, Vol. CT-16, No. 2, May 1969, pp 189-195.

Beauregard, W.G., "Phase Difference Networks," RF Design 1991 Directory, pp 89-92.

Bedrosian, S.D., "Normalized Design of 90 Degree Phase-Difference Networks," IRE Transactions on Circuit Theory, Jun 1960, pp. 128-136.

Darlington, S., "Realization of a Constant Phase Difference," Bell System Technical Journal, Jan 1950, pp. 94-104.

David, C.G. Luck, "Properties of Some Wideband Phase Splitting Networks," Proceedings of the IRE, Feb 1949, pp. 147-151.

Dickey, R., "Outputs of Op-Amp Networks Have Fixed Phase Difference," Electronics, 21 Aug 1975, pp. 82-83.

Dome, R.B., "Wide Band Phase Shift Networks," Electronics, Dec 1946, pp. 112-115.

Garver, Robert V., "360-Degree Varactor Linear Phase Modulator," IEEE Transactions on Microwave Theory and Techniques, Mar 1969, pp.

137-147.

Gingell, M.J., "Single Sideband Modulation using Sequence Asymetric Polyphase Networks," Electrical Communication, 1973, Volume 48, Number

1 and 2, pp. 21-25.

Glance, Bernard, "A Fast Low-Loss Low-Drive 14-GHz Microstrip PIN Phase Shifter," IEEE Transactions on Microwave Theory and Techniques, Vol. MTT-28, No. 6, Jun 1980, pp. 669-670.

Gschwindt, A. (HA5WH), "Some Reflections on the Four-Way Phasing Method," Radio Communication, Jan 1976, pp. 28-33.

Harrison, Roger (VK2ZTB), "A Review of SSB Phasing Techniques," Ham Radio, Jan 1978, p. 52.

Horowitz and Hill, "The Art of Electronics, 2nd ed.," Cambridge University Press, 1990, p. 295.

Keely, T., "Design of Constant Phase Difference Networks," RF Design Apr 1989, pp. 32-42.

Lloyd, Allan, "90-Degree Phase-Difference Networks Simply Designed," Electronic Design, 13 Sep 1976, pp. 90-94.

Lloyd, Allan, "BASIC Program for 90 Degree Allpass Networks", RF Design, Apr 1989, pp. 47-50.

Lloyd, Allan, "Here's a Better Way to Design a 90 Phase Difference Network," Electronic Design, 22 Jul 1971, p. 78.

Luck, David G.C., "Properties of Some Wide-Band Phase-Splitting Networks," Proceedings of the IRE, Feb 1049, pp. 147-151.

Lucyszyn, Stepan and Ian D. Robertson, "Synthesis Techniques for High Performance Octave Bandwidth 180-Degree Analog Phase Shifters," IEEE Transactions on Microwave Theory and Techniques, Vol. 40, No. 4, Apr

1992, pp. 731-739.

Norgaard, D.E., "The Phase Shift Method of SSB Signal Generation," Proc. IRE, (Single Sideband Issue), Vol. 44, Dec 1956. pp. 1718-1735.

Norgaard, D.E., "The Phase Shift Method of SSB Signal Reception," Proc. IRE, (Single Sideband Issue), Vol. 44, Dec 1956, pp. 1735-1743.

Orchard, H.J., "Synthesis of Wideband Two-Phase Networks," Wireless Engineer, Vol. 27, Mar 1950, pp. 72-81.

Pease, Robert A., "DAC Lends Digital Control to Phase-Shifter," EDN Design Ideas Special Issue, Vol. II, pp. 154-155.

Saraga W., "The Design of Wide-Band Phase Splitting Networks," Proceedings of the IRE, Vol. 38, 1950, pp. 754-770.

Schiek, Burkhard and Jurgen Kohler, "A Method for Broad-Band Matching of Microstrip Differential Phase Shifters," IEEE Transactions on Microwave Theory and Techniques, Vol. MTT-25, No. 8, Aug 1977, pp.

666-671.

Schiffman, B.M., "A New Class of Broad-Band Microwave 90-Degree Phase Shifters," IRE TRansactions on Microwave Theory and Techniques, Apr

1958, pp. 232-237.

Schmidt, Kevin (W9CF), "Phase-Shift Network Analysis and Optimization," QEX, Apr 1994, pp. 17-23.

Shirley, F.' "Shift Phase Independent of Frequency," Electronic Design, 1 Sep 1970, pp. 62-66.

van Grass, D.H. (PA0DEN), "The Fourth Method: Generating and Detecting SSB Signals," QEX, Sep 1990, pp. 7-11.

Wade, A.I.H (G3NRW), "Design Criteria for SSB Phase-Shift Networks," Ham Radio, Jun 1970, pp. 34-42.

Weaver, D., "Design of RC Wide-Band 90 Degree Phase Difference Network," Proceedings of the IRE, Apr 1954, pp. 671-676.

Webb, Joseph and Kelly, M.W., "Delay Lines Help Generate Quadrature Voice for SSB," Electronics, 13 Apr 1978, pp. 115-117.

White, J.F., "High Power, PIN Diode Controlled, Microwave Transmission Phase Shifters," IEEE Transactions on Microwave Theory and Techniques, Mar 1965, pp. 233-242.

Wilds, R.B. (K6ZV), "Formation of Passive Lumped Constant 90 Degree Phase-Difference Networks," Ham Radio, Mar 1979, pp 70-73.

Wilds, Robert B., "Try L/8 Stubs for Fast Fixed Phase Shifts," Microwaves, Dec 1979, pp. 67-68.

Yoshida, Tetsuo (JA1KO), "Polyphase Network Calculation Using a Vector Analysis Method," QEX, Jun 1995, pp. 9-15.

You might want to come at this problem from a slightly different angle.

A lot of PCs these days have audio interfaces which can support at least four synchronized outputs (e.g. front and back, left and right).

You could generate the desired test signals digitally, split a single signal into four, apply whatever time delay or phase adjustment you find appropriate (plain time delay, Hilbert transform, etc.) to various channels, and then output the four channels all at once through the sound-card API.

A cheap laptop and a bit of software might give you more flexiblity and lower distortion than an analog circuit hooked to a traditional tone/function generator.

Even an old laptop with a duff sound interface could work... just plug in a a USB-based multichannel sound "card" (cheap) and you'd be good to go.

I'll bet that Audacity may have plugins available to do the phase shifting for you... and it's free.

--
Dave Platt                                    AE6EO
Friends of Jade Warrior home page:  http://www.radagast.org/jade-warrior
  I do _not_ wish to receive unsolicited commercial email, and I will
     boycott any company which has the gall to send me such ads!

Thanks for the bibliography!

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

I won't be posting the raw data. I had to move things around so that i had room lots of GB for the raw files. I suppose that screen shots of = the output (441 files?). Oops, setup the simulation wrong. Should only be about 20 files. Takes a bit of time on this modest machine. I'll get back to you.

?-)