Conventional crossover network design tends to be an empirical art, due mainly to the complex load impedance, and to drive unit amplitude response irregularities. This paper presents a new computer-aided design method, which is not based on the normal optimization routines, and as such does not require a circuit topology from which to start optimization. Instead, assuming a lossless network and working from the Thevenin equivalent of the impedance of the network as seen from the load, the real and imaginary parts of this impedance, being related by the Hilbert Transform, may be calculated to give the desired power transfer to the load. From the knowledge of the load impedance, the voltage response can thus be determined. A rational function approximation is then made to this impedance curve, from which a lossless network terminated in a resistor (the cable plus generator resistance) may be synthesised using standard circuit theory techniques. Input to the program is simply measured data of the load impedance, the target response and the drive unit response. At present the technique does not take into account the practicalities of component tolerance and losses.
Authors:
Jones, A.; Hawksford, Malcolm J.
Affiliation:
University of Essex, Colchester, Essex
AES Convention:
65 (February 1980)
Paper Number:
1589
Publication Date:
February 1, 1980
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.