參數(shù)資料
型號: HT9015
廠商: Holtek Semiconductor Inc.
英文描述: RF Single Chip for Cordless Phone
中文描述: 射頻單芯片無繩電話
文件頁數(shù): 1/23頁
文件大?。?/td> 206K
代理商: HT9015
HT9015
RF Single Chip for Cordless Phone
1
April 10, 2000
Features
Operating voltage: 2.7V~6V
Extremely low power consumption current
I
CC
= 0 A (typ.) in battery-saving mode
I
CC
= 8.5mA (typ.) in standby mode
I
CC
= 13.5mA (typ.) for communication
Built-in IF decoder, compander and PLL
IF decoder
1st/2nd Mixers, RX VCO
RSSI quadrature detector, IF AMP
Noise detector
Compander
Expander, Compressor, Limiter
Receive AMP, MIC AMP, PRE AMP
PLL
RX PLL, TX PLL
Local oscillator
Data latch control
Unlock detector
Four threshold variable battery alarms
General Description
The HT9015 is an RF single chip for cordless
phone systems. Internally these are three major
parts, a PLL, an IF decoder and a compander.
The PLL provides radio channel selection for
either the transmitter or receiver. Frequency
locking status of the selected channel can be
monitored by a control register.
The IF decoder provides two frequency down
converters that let high frequency signals pass
through a mixer and local oscillator to be low-
ered for frequency even base band signals. It
also provides an RSSI (receiver signal strength
indicator) function to detect the IF output sig-
nal strength and built-in noise detector for S/N
quality.
The compander provides better S/N ratio for
audio signal processing.
The HT9015 has a wide-range applications in
FM/FSK, Transmitting/Receiving of VHF
bandwidth including cordless phone, narrow
band voice and data transceiver systems.
The most significant advantage of the HT9015
is in the reduction of many external compo-
nents making it well suited for cordless phone
baseset, handset radio section.
Preliminary
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