Digital Electronics

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Digital electronics notes, lectures for engineering and diploma students

AC/DC Converters – Rectifiers

AC/DC converters serve as rectifiers. They convert ac to dc in a number of industrial, domestic, agricultural, and other applications.

RC High-Pass Filter Circuit

Fig. 1 shows the series RC high-pass circuit. In such circuit, the output is taken across the resistor and practically reactance of the capacitor decrease with increasing frequency.

RCL Filter Circuit

Consider the series RLC filter circuit shows in Fig. 1(a). If a unit step function is applied, we see that:

RC Low-pass Filter Circuit

Fig. 1 shows the series RC low pass circuit. This circuit is identical with that of high-pass circuit except for the fact that the output is now taken across capacitor C instead of across resistor R.

8051 MICROCONTROLLER ADDRESSING MODES

When instructions operate on data, the question arises: "Where are the data?" The answer to this question lies in the 8051's "addressing modes."

8051 MICROCONTROLLER INSTRUCTION TYPES

The 8051 microcontroller instructions are divided among five functional groups: Arithmetic, Logical, Data transfer, Boolean variable, Program branching

VACUUM TUBE TRIODE

Triode

Triode is a vacuum tube with three electrodes which are cathode, Anode and a control grid. The function of additional third electrode is to serve as an electrostatic screen which shield the

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