U2759B Datasheet, PDF (4/9 Pages) TEMIC Semiconductors – IF Signal Processing for DAB

U2759B
LO
The externally generated oscillator frequency is supplied
via crosspoint capacitances at Pin 8 and /or Pin 9. If the
oscillator frequency is not symmetrically connected, each
open pin has to be blocked against ground.
AGCT
The control voltage for the wide–band amplifier is
generated by using the external capacitor at Pin 5. By
integration of the control current generated in the IC,
there is a high control voltage if there is a large input level
at IF1 and a low control voltage if there is a low input
level.
8
9
50 W
5.6 kW
5.6 kW
9243
9230
5
Figure 10.
Figure 8.
DC
The dc mean value of the output signal is adjusted by
using an external voltage at Pin 11. The voltage at Pin 11
always has to be higher than the voltage at Pin 10.
THRIF
The control threshold for the AGC is adjusted by using an
external voltage.
5 kW
11
9245
Figure 9.
10
9244
Figure 11.
4 (9)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 06-Sep-96