Texas Instruments TRF1500 사용자 설명서
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.
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.
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.
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