To: | rsgb_lf_group@blacksheep.org |
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Subject: | Re: LF: Si5351A syntehsiser able to fire a FET driver chip directly?? |
From: | Andy Talbot <andy.g4jnt@gmail.com> |
Date: | Wed, 3 Jan 2018 16:41:19 +0000 |
Cc: | Chris Wilson <dead.fets@gmail.com> |
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There something odd _ I've just checked the data sheet http://ww1.microchip.com/downloads/en/DeviceDoc/22022b.pdf for the MCP1404 you are using (I used the MCP14E4 slightly later I think and the thresholds are listed as slightly different. <0.8 and > 2.4V for '0' and '1' respectively That calls for a mean of 1.6V but not that different from the 1.8 calculated. So don't see whay your 1.8V mid bias fails. Stick a pot on the input and actually MEASURE the exact input voltage at which the device switches Andy G4JNT ![]() On 2 January 2018 at 23:35, Chris Wilson <dead.fets@gmail.com> wrote:
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