EMRFD Chapter 8 Errata.
The title of the chapter is Direct Conversion Receivers
rather than Direct Converstion Receivers. (24Feb03)
"A Minimalist Direct Conversion Receiver."
This section describes an extremely simple receiver that
has been popular as a construction project. This is not
really an errata; the circuit works as described. However,
some improvements have been made. These can be viewed by
clicking here. http://w7zoi.net/MicroR1.pdf
p8.5. Fig. 8.7. Add a 560 pF
capacitor in parallel with the 150 K-Ohm resistor in the
first audio amplifier.
p8.5, Fig. 8.7. Mark
schematic with transistor reference designators Q1 to Q3, left
to right. (22June03)
Fig 8.7. A new schematic was generated which should be
easier to read.
p8.6. left text column, 4.7 inches down
from top of text. Replace mV with uV. (20Mar03)
column1, 2.1 inch up from bottom. Change "it's ground lead" to "its ground
Equation 8.3. The units should be watts/meter^2
(watts per meter squared with a superscript) rather than watts
per meter. (20Mar03)
p8.12, middle col, 2.2 inch up
from text bottom. change "Rather the attempting..." to
"Rather than attempting." (22June03)
right col, just above Fig 8.20 in text. Replace 1N4184
with 1N4148. (26Dec05)
p8.14, Fig 8.22. The
upper right part of the figure contains the Low Noise Audio
Amplifier consisting of a common base stage followed by a common
emitter amplifier. A follower operates as a capacitance
multiplier to supply low ripple DC to the two LNA stages.
The common base stage is shown with a 10K collector R and a
5.6K/3.3K base bias network. The collector R should
be 5.6K while the base bias should come from a 10K/3.3K divider.
p8.14, Fig 8.22: A new schematic was
generated which should be easier to read.
p8.16, 3.6 inch up
from bottom: Change "in it's second..." to
"in its second..." (21Oct15)