NEW PAK204 Common Emitter Push-Pull wingspread plots using a spreadsheet. Download
PAK201 – Multi-diode solution for 2D+R
PAK202 – Multi-diode solution for R+[(D+D+R)//(D+R))]
PAK203 – Multi-diode solution for D+(R//(D+R))
PAK205 – Multi-diode solution for (Vb+D)//(-Vb+D)//R for Iin drive and Vin
PAK206 – Multi-diode solution for (Vb+D+R)//(-Vb+D+R)//R for Iin and Vin <-NEW
PAK207 – BJT modelling for Vce saturation
PAK208 – BJT modelling for Beta-fall
PAK209 – BJT modelling for Early effect
PAK210 – BJT modelling for thermal effects
PAK211 – BJT modelling for electro-thermal feedback
PAK212 – MOSFET modelling
PAK213 – Triode Tube modelling
PAK214 – Basic Darlington pair
PAK215 – Basic Complementary Pair (CFP)
PAK216 – Basic Voltage Feedback Pair
PAK217 – Differential pair (BJT LTP)
PAK218 – Basic BJT current mirror & current source
PAK219 – Vbe multiplier
PAK220 – Basic Cascode pair
PAK221 – Rush Pair or Composite Pair
Level 3 – How to solve multi-diode transistor circuits (Link to Level 3 circuit download)
PAK301 – Basic push-pull <-NEW
PAK302 – Darlington push-pull
PAK303 – CFP push-pull
PAK304 – Current Feedback Amplifier <-NEW
PAK305 – Spare
PAK306 – Faran-AB = Idriven Double Displacement Class-AB+C
PAK307 – DoubleCross™ Double Displacement Class-AB+C Vdriven
NEW PAK307 DoubleCrossTM CE wingspread plots using a spreadsheet Download
This new idea allows near-zero distortion in the Class-A band of Class-AB up to 3W with certain bias levels. Thermal bias stability is better than standard Class-AB due to near isothermal operation due to a relatively high idle current (~250mA per 2 pair BJT's). Design details and measured distortion is given in Bob Cordell's book 'Designing Audio Power Amplifiers' 2nd Ed. Section 13.8.
NEW LTspice simulation of the basic DoubleCrossTM CE output stage can be downloaded Level 3 circuit download. It includes the W-solution equations, same as used in the spreadsheet above.
Level 4 – Solve complete amplifier circuits
PAK401 – Master's level – Wilson Mirrors
PAK402 – Basic Lin “3 stage” topology – general DC solution
PAK403 – Basic Lin topology DC solution as a generalised subcircuit
PAK404 – Lin topology with Beta-fall, Early effect & saturation– DC general solution
PAK405 – Lin topology as a generalised subcircuit (Beta-fall, Early, saturation)
PAK406 – Advantages and disadvantages of current driven output stages
PAK407 – Cube-law amplifier topology – general DC solution
PAK408 – Cube-law amplifier topology as a generalised subcircuit
PAK409 – Current Source Driven topology – general DC solution
PAK410 – Current Source Driven topology as a generalised subcircuit
PAK411 – Faran-AB current driven topology DC solution
PAK412 – Faran-AB current driven topology as a generalised subcircuit
Level 5 – Doctorate? –New FFT Analytic Harmonic Analysis, Transient analysis and AC analysis for general Lambert W DC/LF solutions and use in SPICE simulators, automated
general Lambert W circuit solution, and transitional Lambert W exact solutions:
PAK501 – New FFT Analytic Harmonic Analysis (AHA) of transistor and tube circuits using the derivatives of general Lambert W DC/LF solutions.
PAK502 – Use of DDE's for amplifier stability analysis (ref Ulsoy). Can jωC and jωL terms be added to DC large signal solutions for steady-state AC analysis?
PAK503 – Add SPICE AC analysis to general DC solutions of transistor and tube circuits.
PAK503 – Software for analytic manipulation of transistor and tube circuit DC solutions.
PAK504 – Exact transitional Lambert W-function solutions for 2nd, 3rd and 4th order polynomials of the form (y^2+by+c) e^y(1+dy) = e^x for multi-transistor circuit solutions.
PAK600 – References, supplementary material
PAK601 – References for PAK course
PAK602 – Spare
Σ60 Sections. All my work is free for use under Creative Commons 4 Attribution. No liability is accepted. Please let me know if you find any errors. PAK Project is not for profit.
You are welcome to use the “Contact” section to email me.