| 摘要 |
To obtain a digital signal representative of the average value of the frequency of a V.C.O. 11, a monostable is used to produce fixed length pulses at an indeterminate frequency. These pulses are counted by a control counter and enable a gate to pass the V.C.O. output to a counter connected as a frequency divider. Both of these counters are preset with the same count state and the "borrow" outputs from the dividing counter are counted in a signal counter, the number of "borrow" pulses received in the time taken for the control counter to count to its preset state being the required digital signal. |
