| 摘要 |
<p>PURPOSE:To speed up the rise time of power supply by providing a power supply connection circuit between a power receiving part and an internal electronic circuit, and isolating the internal electronic circuit until voltage rises up to the voltage capable of operating the internal electronic circuit after the start of the supply of power. CONSTITUTION:A section from a power supply circuit 4 to a rectification circuit is considered as a power supply part 1, and a rectified power signal is supplied as the operating power of the internal electronic circuit 2 through the power supply connection circuit 3. The power supply connection circuit 3 consists of a voltage detection circuit and a power transistor, etc., and when an input voltage level is low, it turns off the power transistor so as not to output an input signal. Namely, until the voltage of the power signal reaches the level to make the internal electronic circuit operatable after the start of the supply of the power, it prevents the power from the power supply part 1 from being supplied to the internal electronic circuit 2. Thus, by not consuming wasteful power, the rise time of the power supply can be speeded up.</p> |
