REDUNDANT STRUCTURE OF FOLLOWUP RECEIVERS

摘要

PURPOSE:To improve reliability by connecting current-use and standby followup receivers to two output terminals of a hybrid circuit. CONSTITUTION:A signal synthesis circuit 3a for synthesizing two error signals 1b and 1c and a signal synthesis circuit 3b for synthesizing output signals of the circuit 3a and a reference signal 1a are provided in a hybrid circuit constitution. The two outputs of the hybrid circuit are inputted into the current-use followup receiver 14 and to the standby followup receiver 15. Thus, there is no necessity of providing a switch circuit for switching between the current-use and standby to improve the reliability.