U2514B-AFN
| Model | U2514B-AFN |
| Description | AM/FM Receiver for Digital Tuning with FM-Stereo Decoder |
| PDF file | Total 15 pages (File size: 236K) |
| Chip Manufacturer | TEMIC |
U2514B
AMIFIN
FMDET
VREF
VREF
3.3 k
13
AMIFIN
12421
15
FMDET
150
m
A
12422
Figure 10.
Figure 12.
The input impedance of the AM IF amplifier is 3.3 k
W
according to the required impedance of most ceramic
filters. The input refers to VREF (Pin 14).
The discriminator allows the connection of a ceramic
resonator or LC tank. A minimization of THD and
adjustment of center frequency versus temperature can
only be achieved by using a LC tank. This performs a
temperature independent stop signal.
FMIFIN
AFSM
25
40
m
A
100 k
12
MPXOUT
11
AFSM
FMIFIN
12423
GND
Figure 13.
Figure 11.
12424
The input impedance of the FM IF amplifier is 330
W
according to the required impedance of most FM ceramic
filters. The input referes to GND (Pin 16).
A capacitor is connected between AFSM (Pin 11) and
GND for smoothing of the FM-AF. This is necessary to
generate a modulation independent stop signal. (Because
the deviation of the FM signal (75 kHz) can be greater
than the stop signal window (25 kHz)). In the
AM-search-mode, the external capacitor smoothes the
demodulated AM-IF-signal.
TELEFUNKEN Semiconductors
Rev. A2, 04-Nov-96
5 (15)
Preliminary Information
Related PDFs
| Model | Description | Manufacturer | Operation |
|---|---|---|---|
 U2514B-AFNG3
|
AM/FM Receiver for Digital Tuning with FM-Stereo Decoder | TEMIC | Preview |
