To the signal line where the pull resistance, pull resistance to do with the trouble to say clearly?
In a word: your signal circuit IC no internal resistance, protection. Pull the signal is determined by a high resistance resistor at the high level, while the resistance from the current limit, pull the same. Pull on the device is the injection current, the output current is down; just pull the weak and strong resistance, no strict distinction between what; for non (collector or drain) open circuit output circuit (such as gates) current and voltage capacity improvement is limited, the pull-up resistor is the main function of open circuit output type of circuit output current for the collector channel. All the pull-down resistor pull-up resistor is used in logic circuit, the circuit current is very small, the logic circuit of MOS tube bias current is microampere, even pA uA, the current level to provide a desired level, such as the current level without any output, because there is a pullup resistor so after a level is actually connected to a high level. Power amplifier circuit with no pull down resistor. Pull the signal is determined by a high resistance resistor at the high level, while the resistance from the current limit, pull the same. The pull-up resistor is the main function of the open circuit output current output channel for the collector; main function is connected with the pull-down resistor resistor together to line in the closed circuit driver (node) to a fixed level. Pull on the device is the injection current, the output current is down to note is that the pull-up resistance caused by too large delay output level, including the choice of the principle of resistance: 1, from the current irrigation ability to save the power consumption and chip considerations should be large enough; resistance...
The pull-up is to position the uncertain signal through a resistor at the high level! Resistive current limiting! Pull empathy!L pull-up is the injection current to the deviceL is weak, but the resistance of the pull-up resistor is differentFor non L (collector or drain) open circuit output circuit (such as the common gate circuit of current and voltage increase) ability is limited, the pull-up resistor is the main function of the open circuit output current output channel for collector
Our company's CNC lathe turret is done so that the high level to the low level of the input signal to adapt the system to understand it
