| 摘要 |
Undesirable higher order modulation components produced by a frequency converter are reduced by means of a second, weakly excited frequency converter. The latter, connected in parallel with the former, generates higher order terms which are injected into a common output wavepath out of time phase with the higher order terms produced by the principle frequency converter. By controlling the relative amplitudes of the local oscillator signals coupled to the two converters, the higher order components can be made to cancel whereas the desired linear signal components generated by the principle converter are substantially unaffected.
|
