# What is logic connections?

According to DIGITAL electronics logic connection can be defined as the combination of gates to realised a particular logic function. e.g decoder; multiplexer; demultiplexer etc

### Why the name is Transistor-transistor logic?

TTL - transistor-transistor logic uses connections between transistors to perform logic functions, rather than connections using resistors or diodes. T - transistor input stage (logic section) T - transistor output stage (power gain section) L - logic Earlier logic families like DTL (D - diode input stage) and RTL (R - resistor input stage) used different components in the input circuit and simpler output circuits. Later logic families like IIL (Integrated Injection Logic) and CMOS…

### What is the difference between an FPGA and CPLD - they're both programmable logic right?

FPGAs and CPLDs are both programmable logic. However the main difference lies in the architecture of the chips. CPLDs have several programmable PLDs which are interconnected via a programmable connections at the global interconnection matrix. FPGAs on the other hand have individual logic blocks - each block can be programmed to implement a logic function such as AND, OR, NOT etc. These blocks are then connected via programmable switches to implement complete logic functions. Compare…

### What are the blocks in logic gates?

The blocks in a logic gate depends on the logic family we use. A logic gate is designed using a specific logic family. The logic families can be DTL, TTL, CMOS etc. The blocks are different for different logic families. The various blocks in various logic families are: Diode logic: diodes and resistors DTL logic : diodes and resistors TTL logic : transistors and resistors NMOS logic: only NMOS FETs PMOS logic: Only PMOS FETs…

### What does TTL applies mean?

TTL is a logic family. A logic family is the set of logic gates designed using a specific approach. Or simply speaking, logic family is the way of implementing logic. TTL stands for transistor - transistor - logic. It involves transistors (BJT) to implement logic. TTL applies means TTL logic family is used or can be applied in that specific application.