公开(公告)号：WO2022003338A1

公开(公告)日：2022-01-06

申请号：PCT/GB2021/051642

申请日：2021-06-29

Applicant: ENTERPRISE CONTROL SYSTEMS LTD

Inventor： HARDING, Simon

IPC: H04B1/04 ,  H03D7/18 ,  H04B1/66 ,  H03D7/00 ,  H04B1/006

Abstract: A signal up-conversion system is described. The system comprises a signal input for receiving an input signal to be up-converted; an oscillator system for generating an up- conversion signal having a selectable frequency; a mixer coupled to the input and to the oscillator, for combining the input signal and the up-conversion signal and to generate an up-converted signal; at least two filters, each of the at least two filters having different filtering characteristics; a signal output; a switch system configured to couple one of the at least two filters into a signal path between the output of the mixer and the signal output; and a controller configured to control a frequency of the up-conversion signal and a filter of the at least two filters coupled into the signal path by the switch system. A method switching between up-conversion frequencies is also described.