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U2300B Datasheet

VHF/UHF-Tuner-IC

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TELEFUNKEN Semiconductors
U2300B
VHF/ UHF-Tuner-IC
Description
This tuner IC requires a power supply of 12 V and per-
forms the function of three separate oscillators and
mixers, SAWF-driver, L.O.-output and tri-state band
switch. Applications are 12 V TV- and VCR-tuners.
Features
D Frequency range from 48 to 860 MHz
D Band A: balanced high impedance mixer input and
amplitude controlled oscillator
D Band B + C: balanced low impedance mixer input and
symmetrical oscillator
D Balanced L.O.-output for prescalers or PLL
D SAW filter driver with low impedance output
D Voltage regulator for stable operating characteristics
D ESD protection on all pins except oscillator pins and
RF-inputs
Benefits
D The integration of 3 bands allows to design economi-
cal 3-band tuners
Block Diagram
13
4 65 7
8 10 9 11
19 2
Osc. A
Osc. B
Osc. C
Voltage Stabiliser
Band Switch
L.O.
12
Mixer Output
SAW–Driver
27
28
17
18
14
Band A
25 24
Rev. A1: 16.10.1995
Band B
RF
Band C
23 22 26 21 20
Figure 1. Block diagram
16 15
13
95 10717
1 (8)
TEMIC Semiconductors
TEMIC Semiconductors



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