| 摘要 |
Power stealing circuit receives data signals on its signal input terminal and diverts some power from the signal input terminal to its power output terminal to power another circuit. When the voltage on the signal input terminal exceeds the voltage on the power output terminal, positive supply power is "stolen" from the signal input terminal to the power output terminal. When the signal input terminal is below the power output terminal, the two terminals are disconnected. A similar circuit "steals" negative supply power. In some embodiments, a comparator compares the voltages on the two terminals and regulates the power stealing operation.
|
