| 摘要 |
<p>PURPOSE:To attain high speed switching by discharging a residual charge in a capacitor completely when a passing frequency is switched so as to prevent occurrence of malfunction due to transient response at switching. CONSTITUTION:The on/off of a 1st switch group is controlled by using a clock signal whose frequency is twice or over of a highest frequency of a processed signal, and the 1st switch group is made up of plural switches S1-S10 switching the connection state of two capacitors or over among plural capacitors C3-C6. Furthermore, a 2nd switch group consists of plural switches X10-X15', X20-X25' connecting/disconnecting two specific capacitors or over among plural capacitors C10-C15, C20-C25 to/from the circuit. Then all the switches S1-S10 of the 1st switch group is tentatively closed in the switching start timing of the switches X10-X15', X20-X25' of the 2nd switch group.</p> |
