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From: schw@maxwell.tmc.edu (David Schwartz)
Newsgroups: comp.dsp
Subject: Re: Hilbert Transformer
Summary: Three references
Message-ID: <9207@hacgate.UUCP>
Date: 28 Jun 90 18:49:08 GMT
References: <267ADD3E.18081@maccs.dcss.mcmaster.ca>
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Organization: Hughes Research Laboratories, Malibu, CA
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Here are some analog Hilbert Transformer references to get you started.  They
work by using two all-pass filter sections where the phase difference betweeen
the sections is 90 degrees of the frequency band of interest
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[1] Frederrick Shirley, "Shift Phase Independent of Frequency," Electronic
Design 18, Sept, 1970, pp. 62-66.

[2] Gerald Roberts, "The Design of Broad-Band Active Delay Line/90 Degree Phase
Difference Networks," IEEE Trans. on Circuits and Systems, Vol. CAS-21, No. 5,
Sept. 1974, pp. 614-617.

[3] S.D. Bedrosian, "Normalized Design of 90 Degree Phase Difference Networks,"
IRE Trans. on Circuit Theory, vol CT-7, June 1963, pp. 128-136.

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David Schwartz, Ph.D.                    schw@maxwell.hrl.hac.com
Hughes Research Laboratories
RL69                                     
3011 Malibu Canyon rd
Malibu, CA 90265