Base Mixer PWB, size-A, General
Description
Use your mouse's "right click" and "Save Link" to download:
a. SKPWB-MXR-ADE,
Schematic, in ExpressPCB software.
b. PWB-MXR-ADE,
Base artwork for PWB, in ExpressPCB software.
Use this drawing to order the pwb from Express.
There is no Parts List since this is a "boiler
plate", and is used for higher level designs.
This Basic Mixer PWB is configured for the footprint
of a
Minicircuits,
ADE-11X. However, there are numerous
mixers, with the same footprint, that can used here. This pwb
layout allows each leg of
the mixer to be configured for various
circuits. Resistors can be added for attenuation, or inductors
and capacitors for low pass, high pass, band pass filters. In the
schematic and layout, the components are identified only as X's.
The pads will accomodate 0805 or 1206 SMT components.
Note that J1, J2, and J3 are not
annotated as specific input functions, ie., RF, IF, or LO. Those
functions depend on the way the mixer is integrated into a higher level
system.
SKPWB-MXR-ADE. Schematic of Basic
Mixer
Since this Basic Mixer PWB is showing a
Minicircuits,
ADE-11X, I need to make this comment. Minicircuits specifies
these pin functions for the mixer:
Pins 1, 4, and 5 are ground. Pin 6 is the L port. Pin 2 is
the R port. Pin 3 is the I port.
In reality, pin 2 is connected, internally, to the
diode bridge. Every other manufacturer (and most of the
Minicircuits mixers) call this diode bridge pin, the I port. Minicircuits
reversed their nomenclature to satisfy their design
requirements.
As with most mixers, the transformer ports can be
interchanged, with good results. That is, pins 3 and 6 are the
transformer ports and either one can be used as the +7 dBm LO port.
PWB-MXR-ADE, Layout of Base Mixer PWB
This layout is showing the locations of all the
components. Of course, not all components will be used for any
one design.
