• Cadenti
  logic family
  medium scale integration
  metal oxide semiconductor
  ac register
  accumulator logic
  adder circuit
  basic computer design
  branch unconditionally
  flowchart
  input and output communication
  input output instruction
  input register
  interrupt cycle
  logic adder circuits
  logic gates
  output register
  register and memory
  binary code
  binary number
  clock pulse
  data types
  decimal numbers
  

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The inverter circuit inverts the logic sense of a binary signal. It produces the NOT, or complement, function. The algebraic symbol used for the logic complement is either a prime or a bar over the variable symbol. In this book we use a prime for the logic complement of a binary variable, while a bar over the letter is reserved for designating a complement microoperation.

The small circle in the output of the graphic symbol of an inverter designates a logic complement. A triangle symbol by itself designates a buffer circuit. A buffer does not produce any particular logic function since the binary value of the output is the same as the binary value of the input. This circuit is used merely for power amplification. For example, a buffer that uses 3 volts for binary 1 will produce an output of 3 volts when its input is 3 volts. However, the amount of electrical power needed at the input of the buffer is much less than the power produced at the output of the buffer. The main purpose of the buffer is to drive other gates that require a large amount of power.

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