| 摘要 |
<p>PURPOSE:To accurately detect the arrival of the control signal by using the signal when the signal of the frequency to discriminate the control signal does not exists in the non-existence range of the control signal in time and exists in the range where it should exist, as the control signal. CONSTITUTION:The portions of a monostable multi MM1, NAND gate NAND1, flip-flop FF1 act as the main part of the means of checking the non-existence of the (f) component in the non-existence range of the (f) component as the FF1 is reset when the detection signal of the frequency (f) component of the control signal arrives during oscillation of the multi MM1. In addition, the portions of MM2, MM3, inversion rotating circuit IV2, NAND2, FF2 act as the main part of the means of checking the existence of the control signal in the whole of the range where the (f) component should exist because the FF2 is reset when the (f) component disappears during oscillation time of the MM3. Thereby, the arrival of the control signal may be accurately detected.</p> |
