Engineering Knowledge

It is a flip-flop that the Q output always takes on the state of the D input at the moment of a clock rising edge, and never at any other time. Since the output takes the value of the D input or Data input It is called the D flip-flop for this reason.

DAC:

("Digital to Analogue Converter"), a device to convert digital signals into analogue signals.

Daisy Chain:

A method of propagating signals along a bus in which the devices are connected in series and the signal passed from one device to the next. The daisy chain scheme permits assignment of device priorities based on the electrical position of the device on the bus.

DAQ:

Data Acquisition System.

DC:

Direct Current.

DC-DC Controllers:

A DC-DC converter (switch-mode power supply) in which the power switch (usually a power MOSFET) is external to the IC.

DDS:

Direct Digital Synthesis. Is a method for digitally generating analogue waveforms, such as sine waves (modulated or not) or arbitrary waveforms. 

Debounce:

Electrical contacts in mechanical pushbutton switches often make and break contact several times when the button is first pushed. A debouncing circuit removes the resulting ripple signal, and provides a clean transition at its output.

Digital Potentiometer:

A solid-state device that emulates a mechanical potentiometer, it is usually controlled via a simple interface.

DIP:

Dual In-line Package.

DMA:

Direct Memory Access. A scheme which reads or writes data directly to memory, bypassing the processor and the processor bus. 

DPD:

Digital Phase Detector.

DPWM:

Digitally Adjusted Pulse-width Modulation.

Drypack:

Is a method for packing integrated circuits in a moisture-free environment. The device is baked and immediately sealed in a vacuum-sealed bag.

Duty Cycle:

Is the ratio of the on-time and total time.

DXF:

(Drawing Interchange Format, or Drawing Exchange Format) is a CAD data file format, developed by Autodesk as their solution for enabling data interoperability between AutoCAD and other programs.