| 摘要 |
PURPOSE:To avoid the noise generated at one ON-line active line insertion and deinsertion of duplicated analog signal amplifier (Amp) from affecting to another Amp. CONSTITUTION:While Amp 1 is in operation and Amp 2 is inserted, the switch 7 is closed at insertion and the control signal 200 is at ''0'' level, FF4 is cleared and the drive gate 8 is inhibited for the operation (in OFF state) and all other output gate operation is inhibited with the control signal 200. Next, when the switch 7 is opened, the operation of the gate 8 and FF4 is enabled, the operation of Amp 1 is finished, and when the BUSY signal 100 is at ''0'' level, FF4 is set and the output signal 300 is at ''0'', the output 400 of the drive gate 8 is at ''0'', the switch 9 is driven and + or -15V is applied to Amp 2. Accordingly, the noise produced at the application is produced only at nonoperation (NONBUSY period) of Amp subject to noise. |
