Terminator3
Advanced Member level 3
Here is well known design by S53MV:
http://lea.hamradio.si/~s53mv/zifssb/xband.html
where positive bias applied to diodes:
I recently found a design where biasing looks a little strange to me:
As i understand, R2 and R3 is a voltage divider. But it is placed before capacitor C1, so it does not affect diode biasing. Diodes are biased using +5V through R1 directly, without voltage divider.
R2, R3 and C1 does not look like low pass filtering. Can anyone explain purpose of R2 and R3?
http://lea.hamradio.si/~s53mv/zifssb/xband.html
where positive bias applied to diodes:
Since only positive bias is available through the 10kohm trimmers for mixer balancing, the BAT14-099R packages should be oriented correctly in the circuit. In particular, one of the two packages has to be installed upside down.
I recently found a design where biasing looks a little strange to me:
As i understand, R2 and R3 is a voltage divider. But it is placed before capacitor C1, so it does not affect diode biasing. Diodes are biased using +5V through R1 directly, without voltage divider.
R2, R3 and C1 does not look like low pass filtering. Can anyone explain purpose of R2 and R3?
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