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Practical and Theoretical Design Cosiderations for Bridge Negative Feedback Amplifiers in Carrier Telephony

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2 Author(s)
Cotterill, M. ; Lynch Carrier Systems, Inc., San Francisco, CA, USA ; Halina, J.

The problem of providing proper impedance matching for interconnecting circuitry in Carrier Telephony Systems is of first-order importance. Transmission branches that contain nonpassive elements, such as amplifiers, are of particular concern and thus require special treatment. Bridge feedback amplifiers employing a hybrid output transformer offer outstanding advantages as a solution. Basic design formulae and a practical example with measured results are presented for such an amplifier.

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Communications Systems, IRE Transactions on  (Volume:5 ,  Issue: 2 )