Unbalanced to balanced high impedance ratio wideband transformer circuit
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United States of America Patent
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Apr 21, 1998
Issued Date -
N/A
app pub date -
Nov 25, 1996
filing date -
Sep 14, 1995
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Abstract
A transformer circuit disclosed performs wideband impedance transformation (matching) and can be used for voltage step-up and step-down applications. The circuit disclosed is comprised of two transmission line transformers and two reactive impedances that compensate the circuit for impedance versus frequency. The circuit disclosed performs a very wideband impedance ratio of 1:9. The circuit may have different turns ratios for transformers T1 and T2 and different values for reactive impedances Z1 and Z2 to accommodate rational, fractional and integer values of transformation up to an impedance ratio of 16:1. Incorporation of a balun in the second transformer provides balanced output.
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