| 摘要 |
PURPOSE:To obtain a pulse generating circuit which generates channel pulses in an optional system by switching the operation of one channel pulse generating circuit. CONSTITUTION:A clock pulse A is frequency-divided by a frequency dividing circuit 101 to apply a start signal B and a frame position signal D to the channel pulse generating circuit 203 while applying a shift clock C to a selecting circuit 202 together with clock signals G and H. Then, the switching between concentration arrangement and distribution arrangement for signals of 24 channels is carried out by applying a clock signal E for six-bit shifting operation and a clock signal F for four-bit shifting operation selectively to the channel pulse generating circuit 203 by the switching operation of the selecting circuit 202, so the size of hardware is reduced considerably. |
