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參數(shù)資料
| 型號： | TUA6020 |
| 廠商： | SIEMENS AG |
| 英文描述： | 2 Band TV Tuner Mixer-Oscillator-PLL with balanced IF-Amplifier(兩波段電視調(diào)諧器（帶振蕩器、IF放大器）) |
| 中文描述： | 2波段電視調(diào)諧器混頻器振蕩器與均衡的中頻放大器（兩波段電視調(diào)諧器（帶振蕩器中頻放大器）鎖相環(huán)） |
| 文件頁數(shù)： | 7/38頁 |
| 文件大?。?/td> | 464K |
| 代理商： | TUA6020 |
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Product Description
2 - 2
TUA6020
preliminary
Wireless Components
Specification, March 2000
2.1
General Description
The
TUA6020
device combines a digitally programmable phase locked loop
(PLL), with a mixer-oscillator block including two balanced mixers and oscilla-
tors for use in TV and VCR tuners.
The PLL block with four selectable chip addresses forms a digitally programma-
ble phase locked loop. With a 4 MHz quartz crystal, the PLL permits precise set-
ting of the frequency of the tuner oscillator up to 1024 MHz in increments of
31.25, 50, 62.5 or 166.7 kHz. The tuning process is controlled by a micropro-
cessor via an I
2
C bus. The device has three output ports. A flag is set when the
loop is locked it can be read by the processor via the I
2
C bus.
The mixer-oscillator block includes two balanced mixers (one mixer with high-
impedance input and one mixer with a balanced low-impedance input), two fre-
quency and amplitude-stable balanced oscillators for LOW/MID and HIGH, an
IF amplifier, a low-noise reference voltage source, and a band switch.
2.2
Features
General
Suitable for analog and digital terrestrial TV tuner
Full ESD protection
Mixer/Oscillator
High impedance mixer input for LOW/MID band
Low impedance mixer input for HIGH band
4 pin oscillator for LOW/MID band
4 pin oscillator for HIGH band
IF-Amplifier
balanced SAW preamplifier
Low output impedance
PLL
PLL with short lock-in time
High voltage VCO tuning output
Fast I
2
C bus
3 NPN bandswitch buffers
Internal LOW-MID/HIGH switch
Lock-in flag
Power-down reset
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