This is an Excel animation and an engineering model of a Buck voltage switching regulator. Excel 2003 was used. Besides real time control of common parameters such as switch ON resistance, load current, load capacitance, output voltage (vout), input voltage (vbat) etc, the user can also run very specialized tests in which the output current and “vbat” can be modulated… Read More... "Power Management: An Animated Buck Switching Regulator Model in MS Excel 2003"

## A Gated Ring Oscillator Demo – Part#2

This is an upgrade from the first part in the sense that it can be adjusted to have more delay based inverters in the feedback (14). This Excel animation is pretty much the same as in the first model, a virtual joystick controls the number of stages in the ring by horizontal movement and it can also control the RC delay… Read More... "A Gated Ring Oscillator Demo – Part#2"

## A Gated Ring Oscillator Demo – Part#1

An interactive animated demo of the gated ring oscillator in Excel 2003 based on the previous tutorial. This model stands out because of the real time schematic animation in Excel. It is controlled by a virtual joystick which is generated using a chart with a macro assigned to it. To start the model click the red dot within the joystick chart.… Read More... "A Gated Ring Oscillator Demo – Part#1"

## An Interactive Gated Ring Oscillator Tutorial – part #4

This is the fourth part of tutorial about making an interactive animated Excel model of a gated ring oscillator in MS Excel 2003. This section adds a joystick to the model which smoothly adjusts the RC delay constant (vertical movement) and the number of delay stages within the ring (horizontal movement). An additional function of the joystick is to control the gating… Read More... "An Interactive Gated Ring Oscillator Tutorial – part #4"

## An Interactive Gated Ring Oscillator Tutorial – part #3

This is the third part of tutorial about making an interactive animated Excel model of a gated ring oscillator in MS Excel 2003. This section deals with upgrading the model from a static table based one (with only 800 time steps) to a hybrid static-dynamic which is reasonably fast, yet it can run for an indefinite number of time… Read More... "An Interactive Gated Ring Oscillator Tutorial – part #3"

## Introduction to Digital Electronics – a Simplified Model for Logic Gates – part#3

This is the third part of a tutorial about modeling logic gates in MS Excel 2003. This first model includes no delay or loading for the gates. This section creates user defined functions for each gate and uses these functions to upgrade the model. An auxiliary macro is created which measures the speed of the model in iterations/second. The model with… Read More... "Introduction to Digital Electronics – a Simplified Model for Logic Gates – part#3"

## Introduction to Digital Electronics – a Simplified Model for Logic Gates – part#2

This is the second part of a tutorial targeted at modeling logic gates in MS Excel 2003. The first part introduced the basic logic gates,, symbols and associated logic equations. This model includes no delay or loading for the gates. The following type of gates will are described: inverter, AND, NAND, OR, NOR, XOR (exclusive or) and XNOR. The tutorial has several parts… Read More... "Introduction to Digital Electronics – a Simplified Model for Logic Gates – part#2"

## Introduction to Digital Electronics – a Simplified Model for Logic Gates – part#1

This is the first part of a tutorial (self, 2, 3) about modeling logic gates in MS Excel 2003. This first model will include no delay or loading for the gates. The following type of gates will be described: inverter, AND, NAND, OR, NOR, XOR (exclusive or) and XNOR. The tutorial will have several parts and the last part will build up… Read More... "Introduction to Digital Electronics – a Simplified Model for Logic Gates – part#1"