Page 196 - Build Your Own Transistor Radios a Hobbyists Guide to High-Performance and Low-Powered Radio Circuits
P. 196
USA
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U6A U68 U7A +------J2.~J 3 To Next Page
~ ';f 74AC74 ~ 74AC74 ~ ';f 74AC74 '-~_---" 0 Degree Phase
.--------...:52~ 0 ~ tr; Q .....,501.-------.., tr; Q ~9~-----.,j~ ...... 2'--1 0 ~ tr; Q t-'2<-------.., ....
~ ~ ~
USC
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iLl+' ~ 1 SO Degrees Phas e
9
8 To Next Page
US8
74AC08
--
4
C18 + 5 51 B To Next Page
~~ 90 Degrees Phase
.01 ut !:
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R15
U5
C19~ 2 A. +9 78L05P 74ACOS
22P~ 74AC04 C20 4~ ~vor 131 270 Degrees ~has e
T 22 pt
R14 11'01 rh C21
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FIGURE 12-1.1A Schematic diagram of an experimental 40-meter RF
circuit for an SDR local oscillator circuit with four-phase oscillator
signals.
