Preliminary
PT9120
GPS Receiver RF Front End IC
DESCRIPTION
The PT9120 is a single chip Global Positioning
System (GPS) receiver front-end IC requiring few
external components and offering extremely low
power consumption. The PT9120 employs a
super-heterodyne receiver topology which
down-converts the 1575.42MHz L1-band GPS
signal to a 1st IF. The 1st IF is then filtered by an
off-chip L-C filter and subsequently sub-sampled
by the 2-bit A/D converter to provide both sign and
magnitude quantized CMOS level outputs to base
band inputs.
FEATURES
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GPS L1-band (C/A code) receiver
Integrated LNA and antenna detector
Fully-monolithic VCO
Support for several reference frequencies
2-bit ADC output (sign and magnitude)
Extremely low current consumption (7mA at
AVDD=DVDD=2.5V)
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Multiple power-down modes
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Available in 28 pins or 24 pins, QFN package
APPLICATION
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GPS systems
BLOCK DIAGRAM
Tel: 886-66296288
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Fax: 886-29174598
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http://www.princeton.com.tw
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2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PTC [ PRINCETON TECHNOLOGY CORP ]
