Texas Instruments TRF1500 - Manual (Page 36)

SWRA004A
TRF1500 Integrated Dual-Band RF Receiver User’s Guide 37
Figure 13 details the TRF1500 configured to utilize the low-band
LO input and doubler as the high-band LO. The high-band LO
signal is injected into the low-band LO input. The buffered signal
is then routed through the doubler. The output of the doubler is
routed through an external capacitor (C40) and into the single-
ended high-band LO input.
Figure 14 details the TRF1500 configured to utilize the high-band
LO. The signal is directly injected into the high-band LO input
which directly drives the high-band down converter.
Note: To use the high-band LO input, remove C40 and
L40, and change the value of C41 to 1pF and populate
C24.
Figure 13. High-Band LO Frequency Doubler Driven Configuration
Figure 14. High-Band LO Directly Driven Configuration