Linear phase modulator

Details Linear phase modulator Linear phase modulator

H - Electricity

03

C

332/61

H03C 3/02 (2006.01) H03C 3/40 (2006.01)

Patent

CA 1076662

A LINEAR PHASE MODULATOR Abstract of the Disclosure The present invention relates to a linear phase modulator comprising two known Armstrong modulators connected in a balanced configuration to eliminate even- order nonlinearities in the output phase modulated signal. In addition, a preselected amount of in-phase carrier is added to the quadrature carrier normally added to the output of the suppressed-carrier modulator forming a part of each Armstrong modulator, the carriers being added to each modulator output, however, differing in phase from quadrature by equal and opposite amounts. By properly preselecting the amount of phase difference from quadrature of the added carriers, third-order nonlinearities can also be substantially eliminated after combining the outputs of the Armstrong modulators in a multiplier circuit.

275066

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