Don't be surprised when you see the gate waveform 'degrade' in an amplifier that's making power. The FET turn on and turn off will show up as 'bobbles' on thejay_w1vd
The Cgs reduction with increased Vd is offset somewhat by Miller feedback. This is where the amplified and inverted voltage waveform on the drain effectivelyandy_jnt
Dear Chris, the load at the FET gate is mainly capacitive, so as the C drops (with rising drain voltage) the power consumption of the driver circuitry should
Usage guidelines are as set out for all RSGB online facilities, see http://www.rsgb.org/pages/?id=online-usage-guidelines
Disclaimer for RSGB LF Group
This is a completely open specialist interest internet group and the Radio Society of Great Britain makes no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the group postings or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk.
In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with, the use of RSGB LF Group.
You must not use RSGB LF Group in any way which is unlawful, illegal, fraudulent or harmful, or in connection with any unlawful, illegal, fraudulent or harmful purpose or activity. The majority of content posted in this forum is created by members of the public. The views expressed are theirs and unless specifically stated are not those of the RSGB. We accept no responsibility for any loss or harm incurred.
Through RSGB LF Group you are able to link to other websites which are not under the control of the Radio Society of Great Britain. We have no control over the nature, content and availability of those sites. The inclusion of any links does not necessarily imply a recommendation or endorse the views expressed within them.
Every effort is made to keep RSGB LF Group up and running smoothly. However, the Radio Society of Great Britain takes no responsibility for, and will not be liable for, the website being temporarily unavailable due to technical issues beyond our control.
- Amateur and Ham Radio
- May 27, 2012
- This is a restricted group.
- Attachments are permitted.
- Members cannot hide email address.
- Listed in Yahoo Groups directory.
- Membership requires approval.
- Messages from new members require approval.
- All members can post messages.