[soft_radio] Re: Advice on some of the new LTSpice circuits

2008-03-01 Thread Daniel Jackson
I was thinking today of the Taylor circuit also. As Cecil says, sometimes the simulations can run slow. But if you got a 2.4 GHz processor it might not take too long. My processor is not that fast. I am seeing that simulation times from 4.5u to 200u appear to show me most of what I need to

[soft_radio] Phase Mixer Circuit News

2008-03-01 Thread Daniel Jackson
The Roll Your Own Split Gilbert Cell thing I have improved the 2N phase mixer circuit and to my surprise the FTT analysis of it shows that the 2cd, 3rd, and 5th harmonics of which are the highest, are all down - 87 dB at a 10 MHz test frequency fully modulated. Imagine a better

[soft_radio] Re: Phase Mixer Circuit News

2008-03-01 Thread Daniel Jackson
I have improved the 2N phase mixer circuit and to my surprise the FTT analysis of it ... This should have read FFT analysis. Dan

[soft_radio] Voltage Dependent Current Source

2008-03-01 Thread Daniel Jackson
Voltage Dependent Current Source? I looked it up, and in this case K appears to be for transconductance, yet the devise also appears to show me the noise in the circuit? Well we will learn more about it. I know it will be useful, someone should have an explanation. I saw allot of mile long

[soft_radio] New file uploaded to soft_radio

2008-03-01 Thread soft_radio
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the soft_radio group. File: /SDR Spice Analysis Files/Quadrature_Phase_Modulator.zip Uploaded by : ka9rza [EMAIL PROTECTED] Description : LTspice, Quadrature Phase

[soft_radio] Quadrature Phase Modulator Upload...for transmitters...

2008-03-01 Thread Daniel Jackson
This file upload is cool This morning here I converted my Quadrature Phase Mixer into a fully working Quadrature Phase Modulator. With separately modulated (I/Q) carrier outputs, combined into a single carrier for transmitter use. I have uploaded the file here for you to run in