| 摘要 |
PURPOSE:To avoid consumption of the undesired current, by increasing and decreasing the mutual conductance of an inverter which is set to the oscillating frequency of a signal generating circuit in response to the frequency of a clock signal. CONSTITUTION:An inverter 2 is designed to the minimum mutual conductance gm that is driven by a frequency obtained while a signal generating circuit is working. A clocked inverter 6 is designed to a high mutual conductance gm which can work even with a clock pulse of a higher frequency supplied from a joint 5. In the case of a normal operation performed by the signal generating circuit, the inverter 6 is nonconductive due to a control signal 7. Then the inverter 6 conducts with the signal 7 when a clock pulse of a frequency higher than the inner oscillating frequency is applied to the joint 5. Thus both inverters 2 and 6 have operations parallel to each other. This can increase the mutual inductance gm of a waveform shaping inverter and therefore avoid the useless consumption of current. |
