DE 1.2 Flashcards
The instantaneous voltage of a waveform. Often used to mean maximum amplitude, or peak voltage, or a pulse.
Amplitude
An algebraic expression made up of Boolean variables and operators, such as AND (-), OR (+), or NOT (-). Also referred to as Boolean function or a logic function.
Boolean Expression
Type of flip-flop in which the D (data) input is the synchronous input.
Clocked D Flip-Flop
A series of logic 1s and 0s plotted as a function of time.
Digital Waveform
One style of integrated circuit package which has two rows of lead.
Dual In-Line Package (DIP)
Fraction of the total period that a digital waveform is in the HIGH state. DC = th/T (often expressed as a percentage: %DC = th/Tx100%).
Duty Cycle (DC)
The part of a pulse where the logic level is in transition from a HIGH to a LOW.
Falling Edge
A sequential circuit based on a latch whose output changes when its CLOCK input receives a pulse.
Flip-Flop
The number of cycles per unit time of a periodic waveform.
Frequency
Unit of frequency. One hertz equals one cycle per second.
Hertz (Hz)
An electronic circuit having many components, such as transistors, diodes, resistors, and capacitors, in a single package.
Integrated Circuit (IC)
Also called a NOT gate or an inverting buffer. A logic gate that changes its input logic level to the opposite state.
Inverter
A diagram, similar to a schematic, showing the connection of logic gates.
Logic Diagram
A piece of test equipment used to view and measure a variety of different waveforms.
Oscilloscope
The amount of time required for one complete cycle of a periodic event or waveform.
Period
Delay from the time a signal is applied to the time when the output makes its change.
Propagation Delays (tPLH/tPHL)
A technique of entering CPLD design information by using a CAD (computer aided design) tool to draw a logic circuit as a schematic. The schematic can then be interpreted by design software to generate programming information for the CPLD.
Schematic Entry
One in which amplitude varies in proportion to the sine function of an angle.
Sine Wave
An almost instantaneous rise and decay of voltage or current in a periodic pattern with time and with a constant peak value.
Square Wave
TTL-compatible IC that can be wired to operate in several different modes, such as a one-shot and an astable multivibrator.
555 Timer
