![]() ![]() Therefore I want to find all the relevant currents for both. There might be other reasons to use pull-up/-down resistors, for example, to get a defined signal when the chips are still in reset and do not drive their outputs either way. I am trying to analyses the operation of a TTL NAND gate with totem pole output configuration. So in your case, you do not need a pull-up resistor to get a correct voltage level. ![]() LS is a TTL family HCT is a CMOS family that has TTL-compatible inputs. This extra branch reduces the converter’s output voltage ripple and distributes the converter’s power requirements equally across all branches, minimizing layout size and overall cost. We don't know if this is important, or not, just yet. To increase the efficiency of a bridgeless totem-pole PFC, additional high-frequency branches can be added to create a staggered totem-pole PFC. One of the first things to understand is the capability of the output, as that is what will be driving other inputs. Simulate this circuit – Schematic created using CircuitLab Let me draw out the schematic using the editor (you should have done this, too.) ![]()
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