| 摘要 |
A synthesizer apparatus is provided allowing very high speed switching while keeping phase continuity. It includes a plurality of cells, each with four mixers, a subtractor and an adder for obtaining at the output two in quadrature signals, of jump frequency ? n Fr, n being an integer, from in quadrature signals of a basic frequency Fr. These signals are then multiplied in a terminal circuit with two in quadrature signals relative to a carrier frequency Fc then added so as to produce the signal transposed to the frequency Fc ? n Fr desired for use. |
