Username mrobbins
Name Mike Robbins
E-mail
Member Since September 23, 2011

mrobbins's Public Circuits:

Now showing circuits 1-20 of 66. Sort by

One-pin boost converter

One-pin boost converter PUBLIC

https://news.ycombinator.com/item?id=14518896

by mrobbins | updated June 08, 2017

Optocoupler LED-phototransistor pair simulation by CCCS

Optocoupler LED-phototransistor pair simulation by CCCS PUBLIC

Optocoupler LED + NPN phototransistor simulated using a CCCS controlled source.

by mrobbins | updated March 06, 2017

Non-linear Resistors and Capacitors RC simulation example

Non-linear Resistors and Capacitors RC simulation example PUBLIC

Using behavioral sources to simulate systems with non-linear RC systems, like thermal systems.

by mrobbins | updated November 05, 2013

Op-amp non-inverting amplifier with parameters

Op-amp non-inverting amplifier with parameters PUBLIC

Using CircuitLab's parameters feature, we've built a parameterized non-inverting amplifier which calculates its own resistance values.

by mrobbins | updated October 01, 2013

amplifier   op-amp  

RF Matching Network Parameters Example

RF Matching Network Parameters Example PUBLIC

CircuitLab's Parameters feature is used to calculate a narrowband impedance L-match to match a higher-impedance signal source to a 50 ohm RF load at 2.45GHz.

by mrobbins | updated October 01, 2013

frequency-domain   rf  

2.5V 250mA simple switching supply with defined gate drive

2.5V 250mA simple switching supply with defined gate drive PUBLIC

An edge-defined gate drive signal is produced by a CSV voltage source, and modulated to form a power supply feedback loop.

by mrobbins | updated September 30, 2013

power-supply   pwm   switching  

Multilevel inverter signal and filtering effect

Multilevel inverter signal and filtering effect PUBLIC

A multilevel inverter signal, a sinusoidal-like source composed of piecewise step voltage segments, is defined using the new CSV voltage source. Simple filtering of the multi-level steps is examined...

by mrobbins | updated September 30, 2013

filter   multilevel  

Translinear SQRT PNP

Translinear SQRT PNP PUBLIC

Translinear analog square root circuit. V(OUT) = SQRT( V(IN) ) / 10

by mrobbins | updated August 07, 2013

bjt   signal   translinear  

AC-power your circuit without a transformer

AC-power your circuit without a transformer PUBLIC

Low-power transformer-less AC-to-DC converter.

by mrobbins | updated July 29, 2013

power-supply  

Voltage-to-Current converter offers precisely defined dead-band

Voltage-to-Current converter offers precisely defined dead-band PUBLIC

Intentional dead-band nonlinearity in an analog voltage-to-current converter.

by mrobbins | updated July 29, 2013

Behavioral Source - Exponential Envelope Decay

Behavioral Source - Exponential Envelope Decay PUBLIC

Sinusoidal source modulated with exponentially-decaying envelope.

by mrobbins | updated July 28, 2013

Back-to-back Diodes (1sec transient)

Back-to-back Diodes (1sec transient) PUBLIC

Proper simulator convergence in back-to-back 1N4148 diode transient simulation. (with longer time duration transient simulation)

by mrobbins | updated July 25, 2013

Back-to-back Diodes

Back-to-back Diodes PUBLIC

Proper simulator convergence in back-to-back 1N4148 diode transient simulation.

by mrobbins | updated July 16, 2013

diode  

Robox's Multi-AC source - Loop gain / return ratio

Robox's Multi-AC source - Loop gain / return ratio PUBLIC

CircuitLab can calculate "return ratio" or "loop gain" to show when a dependent source can create an unstable system.

by mrobbins | updated December 20, 2012

feedback  

Robox's Multi-AC Source Question

Robox's Multi-AC Source Question PUBLIC

CircuitLab supports multiple AC input sources for frequency domain analysis.

by mrobbins | updated December 20, 2012

feedback  

Physics: Car Suspension pt. 1 (Spring, Mass, Damper)

Physics: Car Suspension pt. 1 (Spring, Mass, Damper) PUBLIC

A model of a simple spring-mass-damper system with a driven wall. Time domain and frequency domain simulations included.

by mrobbins | updated September 10, 2012

laplace   mechanical  

Precision Active Peak Detector

Precision Active Peak Detector PUBLIC

An op-amp plus diode form a "precision" active peak detector, where the op-amp eliminates the diode drop that would otherwise occur with a passive peak detector.

by mrobbins | updated August 03, 2012

active-filter   diode   op-amp   signal  

P-MOSFET Buck Converter (Switching Power Supply)

P-MOSFET Buck Converter (Switching Power Supply) PUBLIC

A simple buck converter model that simulates.

by mrobbins | updated August 02, 2012

power-supply   switching  

Exclusive OR (XOR) Equivalent Circuit

Exclusive OR (XOR) Equivalent Circuit PUBLIC

XOR gate depicted in sum-of-products representation (composed from OR, AND, NOT gates).

by mrobbins | updated July 23, 2012

digital  

Op-amp low-pass/high-pass analysis

Op-amp low-pass/high-pass analysis PUBLIC

Understanding op-amp filters with poles and zeros.

by mrobbins | updated July 13, 2012

active-filter   op-amp