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.
Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
Subject: Re: HI FI amplifier question: help needed
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Date: Sat, 7 Sep 2002 18:12:24 +0100
NNTP-Posting-Date: Sat, 07 Sep 2002 18:12:24 BST
"Guillaume sjm" wrote in message
> in an amplifier, there is a V amp followed by a Current Amp.
> The power supply is usually split in +V and -V
> I have a sudden doubt: Here is my question: the amplitude of the
> after the V amplification should be about the toal supply or half ? I
> if i supply with +-32Volts, the signal coming out of my Vamplifier
> read +-16 volts or +-32 ?
At *full* output power the goal is to get to as near to +/- the rails as
possible. A bipolar amp will usually get within 2 volts. A mosfet
usually only about 5-10 volts towards the rail, unless a more involved
drive circuit is used.
> This is to make a hybrid with some tube Vamplification followed by
> current amplification.
> Second question: a Mosfet can accept how much V on its Gate ? is it
> the power supply or much less ? i noticed on some schematics that
there is a
> zener diode of about 15 Volts on the gate to protect it. In this case,
> the Voutput limited to +-15Volts ?
Typically a mosfet can only take about +/- 20V Max across its gate
source, some can take as much as 40V, so you do need to limit their
voltage drive. However, usually 10V of gate source voltage will get you
maximum rated current.
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup