5-14-08. Update for name changes. Updated
8-11-09. Update components without changing
other documents. Add revision history Updated
5-18-15. Update Parts List, Change PL to Rev
A, and move to this page.
Buffer Squarer, size-A
Use your mouse's "right click" and "Save Link" to download:
a. SKSLIM-BSQ Rev 0,
b. LAYSLIM-BSQ Rev 0,
Use this drawing to locate
parts on the Board
c. PLSLIM BSQ Rev A, Parts List, on bottom of
this page, only.
d. PWB-MOB Rev 0,
Base artwork for PWB, in ExpressPCB software.
Use this drawing to order the pwb from Express.
This SLIM is constructed on a common printed
board, the PWB-MOB. Click to go to the
page describing the Master Osc or Buffer.
Revision History Original Release: Released on
The purpose of the SLIM-BSQ is to take an
buffer it, square the waveform, and drive up to 3 separate
users. The input signal can be a sine or square wave with a level
from -10 dBm to +18 dBm. The input impedance is determined by the
value of R9.
The Buffer Squarer contains a center
biased buffer and 3 line drivers. Each
output is 5 volt CMOS that can drive a 50 ohm line that is
with either, a high impedance load, or 50 ohms. A 49.9
resistor is shown as a series element in each output. Updated
8-11-09. However, a 33 ohm resistor is
a much better matching resistor.
For a 50 ohm
line, with a high impedance load at the end of that line, the
mismatched load will create a reflection. The
reflected signal will be dissipated
in the series 49.9 (or 33) ohm resistor.
For a 50 ohm
line, with a 50 ohm load at the end of that line, the 50 ohm load will
receive a 2.5 volt peak to peak square wave. If this is not
sufficient, the 49.9 ohm series resistor can
be replaced with a low impedance coupling capacitor (.01 uf for 64
SKSLIM-BSQ, Schematic of Buffer Squarer, SLIM-BSQ Updated
33 ohm resistor is a much better
matching resistor, used for R1, R2, and R3. Updated
ferrite bead, FB1 may be replaced
with a 10 ohm resistor to improve noise rejection on the input power