The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Choosing the right transformer
Date: Sun, 19 Jan 2003 18:50:09 GMT
NNTP-Posting-Date: Sun, 19 Jan 2003 10:50:09 PST
> Here's the block diagram of the system
> CD player -->digital out-->(DSP or FPGA)-->one-bit
One bit output is a bit misleading because it is PWM output. Let's put
the feedback in.
CD player -->digital out-->DSP-->one-bit-output-->(1)
| A/D |
In the above, the DSP compares the data word from the CD with the
digital word from the A/D converter. If they are different, the pulse
width is corrected accordingly.
This is expensive for audio because of the high resolution of the A/D
but it can be done. In servo systems having very similar block diagrams,
closing the loop on class D amplifiers is always done when quality
considerations do not forbid class D (most engineers will not consider
using class D amplifiers in the same system with low level signal
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons email@example.com
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup