I designed 1 shotkey diode crystal radio

I designed 1 shot-key diode crystal radio

This simulation result for 1 shot-key diode crystal radio does work by the latest theory of the spice technology.  Traditional 1 diode crystal radio invented in early 20 century and it worked on the different theory that called as "Envelope demodulator".
If this simulation here is correct, I'm afraid that there may be wrong understandings of 1 diode radio works so called "Germanium Radio" or "Crystal radio" for about a century since 1925.

Seeing is believing.

You can simulate it by LTspive IV( Linear Technology Inc.).
Here is .asc file for LTspice.

https://drive.google.com/file/d/0Bz_k52236Ymuc2RvNXZuVVRqRWs/view?usp=sharing

on my Google Drive.

Principle of 1 Diode AM radio (New Theory of how to work crystal radio)
(AM : Amplitude Modulation)

(1)AM broadcasting station sends Carrier 600 KHz Sine wave, modulated USB(Upper side band ) sine wave 600.2KHz and modulated LSB (Lower side band) sine wave 599.8KHz.

(2) This radio's LC circuit is tuned on 600KHz.

(3) These 3 frequency Sine waves are mixed on the shot-key diode BAT54 and modulated audio 200Hz Sine wave is generated.

(4) Carrier Sine wave 600KHz is converted to DC voltage and is charged on the 0.001uF condenser. This DC voltage is constant + offset voltage.

(5) Extracted 200Hz audio signal of Sine wave rides on the DC offset voltage of the condenser 0.001uF. This Sine wave 200Hz is never cut by the diode because it rides on DC offset of (4).

(6) Hence we can hear 200Hz Sine wave from crystal earphone that is written as 1Meg ohm register.

APPENDIX:

A. Crystal Radio simulation by LTspice IV / Transient analysis and FFT analysis

 Crystal Radio simulation by LTspice IV / Transient analysis and FFT analysis

Note; 

I" d like you to re-consider the difference of the works of traditional diode / peek detector theory, and I'm happy if you find out the true works of it.

Return to INDEX