# Discussing Resource Usage **What do we need to use for any given logic circuit?** For any given logic circuit, we need to use *a certain combination of logic gates.* **Is there a limit to how complicated any solution can grow?** *Yes*, there's a limit to how complicated any solution can grow. > **What can limit the design of complicated logic circuits on FPGAs?** > *The number of available transistors* can limit the design of complicated logic circuits on FPGAs. **What do the designers of an FPGA chip have to consider?** The designers of an FPGA chip have to consider *the circuits their customers will design and place on that chip.* **What logic gates do the designers of FPGAs use to ensure there's no trade-off with the type of circuits that can be made on them?** The logic gates that the designers of FPGAs use to ensure there's no trade-off with the type of circuits that can be made on them are *Universal Gates.* **What are Universal Gates?** Universal Gates are *logic gates that can be recombined to produce the effect of any other logic gate.* > **What are the two Universal Gates?** > The two Universal Gates are: > 1. NAND. > 2. NOR. **What is a net in Verilog?** In Verilog, a net is *a set of wires with a single driver at the same voltage level.* **What is a driver in Verilog?** In Verilog, a driver is *a component which sets the voltage level for a net.* > [!example] Two examples of drivers in Verilog > 1. The output of a switch. > 2. The output of a gate. **What happens if a net is driven by multiple drivers in Verilog?** In Verilog, if a net is driven by multiple drivers *it results in a multiple driver nets error.* **Why is a gate not considered to be driven by multiple drivers?** A gate is not considered to be driven by multiple drivers *because the components which control the flow of current have an air gap, meaning no contact is made internally between the different nets.* > **What components are used inside gates to control the flow of current?** > The components used inside gates to control the flow of current are *MOSFETs.* > > **What does MOSFET stand for?** > MOSFET stands for *Metal-Oxide-Semiconductor Field-Effect Transistor.* ...