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TEMIC Semiconductors
TEMIC Semiconductors


U2759B

IF Signal Processing


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U2759B pdf
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IF Signal Processing for DAB
U2759B
Description
The U2759B is a bipolar integrated IF signal processing circuit. It is designed for DAB (Digital Audio Broadcasting)
applications.
Features
D High linearity of the complete circuit
D 3-stage gain controlled wideband amplifier
D Internal AGC loops
D AGC time constants and thresholds adjustable
D Mixer: double balanced high current Gilbert Cell
Block Diagram
IF1IN
IF1IN
16
1
AGCPRE 3
THRPRE 2
DC
11
9144
89
LO LO
5
AGCT
Figure 1.
10
THRIF
6 IF2OUT
7
NC
Bandgap 14 VS
12 13
VREF BG
4
GND
15
GND
Ordering and Package Information
Extended Type Number
U2759B-A
U2759B-AFL
U2759B-AFLG3
Package
DIP16
SO24
SO24
Remarks
Taping according ICE-286-3
TELEFUNKEN Semiconductors
Rev. A1, 06-Sep-96
Preliminary Information
1 (9)



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U2759B pdf
U2759B
Pin Description
IF1IN 1
16 IF1IN
THRPRE 2
15 GND
AGCPRE 3
14 VS
GND 4
13 BG
AGCT 5
12 VREF
IF2OUT 6
NC 7
11 DC
10 THRIF
LO 8
12585
9 LO
Figure 2. Pinning DIP16
IF1IN 1
THRPRE 2
24 IF1IN
23 GND
NC 3
22 NC
AGCPRE 4
21 NC
GND 5
20 VS
AGCT 6
19 BG
NC 7
18 VREF
IF2OUT 8
17 DC
NC 9
16 THRIF
NC 10
15 NC
NC 11
14 NC
LO 12
13 LO
12584
Figure 3. Pinning SO24
Pin Symbol
Function
1 IF1IN IF1 input
2 THRPRE AGC-threshold for pre-amplifier
3 AGCPRE AGC for pre-amplifier
4 GND Ground
5 AGCT AGC time constant for
IF amplifier
6 IF2OUT IF2 output
7 NC Not connected
8 LO Local oscillator
9 LO Local oscillator
10 THRIF AGC-threshold for IF amplifier
11 DC DC-level
12 VREF Reference voltage
13 BG Bandgap
14 VS Supply voltage
15 GND Ground
16 IF1IN IF1 input
Pin Symbol
Function
1 IF1IN IF1 input
2 THRPRE AGC-threshold for pre-amplifier
3 NC Not connected
4 AGCPRE AGC for pre-amplifier
5 GND Ground
6 AGCT AGC time constant for
IF amplifier
7 NC Not connected
8 IF2OUT IF2 output
9 NC Not connected
10 NC Not connected
11 NC Not connected
12 LO Local oscillator
13 LO Local oscillator
14 NC Not connected
15 NC Not connected
16 THRIF AGC threshold for IF amplifier
17 DC DC-level
18 VREF Reference voltage
19 BG Bandgap
20 VS Supply voltage
21 NC Not connected
22 NC Not connected
23 GND Ground
24 IF1IN IF1 input
2 (9) TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 06-Sep-96



Part Number U2759B
Description IF Signal Processing
Maker TEMIC Semiconductors - TEMIC Semiconductors
Total Page 9 Pages
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