Ref:

2.www.chaotic-circuits.com/chaotic-oscillators/

In version 0.2.8: The design of symbol is by drawing the body: line, arc, rectangle … etc, Fig:

And attaching by description model Fig:

In version 0.2.7 contains :

Diode, Zener, Bridge, BJT (NPN) and BJT (PNP)

In version 0.2.6 contains source analog electrical components:

Vdc

Sine Voltage

Trapezoid Voltage

FM Voltage

AM Voltage

Pulse Voltage

ExpSine Voltage

Exponential Voltage

AC Voltage

Idc

Sine Current

Trapezoid Current

Pulse Current

ExpSine Current

Exponential Current

AC Current

FM Current

AM Current

In version 0.2.6 (alpha) based by Python 2.7.12 software with revision of Modeling of Analog Blocks “basic and source” in PyAMS language.

This version contains basic analog electrical components:

Resistor

Inductor

Capacitor

Polarised Capacitor

Conductor

Quartz

Transformer

Symmetrical transformer

Gyrator

Linear controlled sources (VCV, VCC, CCV, CCC)

Amplifier Non-inverting by uA741

Circuit:

Vout by Vin:

macro model of uA741 by SPICE:

Ref:

FSK Digital Frequency Modulation

FSK demodulation with PLL (phase locked loop)

Function FSK by Vin:

Function Vf1 by FSK:

Function Vco by Vf1:

Function Vout by Vin and Vtr:

Ref:

1.http://fabrice.sincere.pagesperso-orange.fr/LTspice/modulation_fsk_pll/fsk_pll_ltspice.html

2. Software: www.pyams.com

Phase-shift oscillator circuit

Referance

1.http://www.learningaboutelectronics.com/Articles/Bandpass-filter-calculator.php#answer2