Practical and Theoretical Design Cosiderations for Bridge Negative Feedback Amplifiers in Carrier Telephony
1957
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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