參數(shù)資料
型號(hào)： U4037B
英文描述： LOW VOLTAGE SPEECH CIRCUIT WITH TONE RINGER INTERFACE
中文描述： 低電壓語音電路的音調(diào)振鈴接口
文件頁數(shù)： 1/6頁
文件大小： 70K
代理商： U4037B
U4037B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 08-Oct-96
1 (6)
Low Voltage Speech Circuit with Tone Ringer Interface
Description
TELEFUNKEN microelectronic’s low voltage speech
and ringer interface circuit, U4037B performs all neces-
sary speech, line interface functions and the tone ringer
required in an electronic telephone set.
The circuit is line powered and contains all components
necessary for amplification of signals and adaption to the
line. The power supply of U4037B provides the MCU
during the ringing and the speech mode.
Features
Speech Circuit
Adjustable dc characteristic
Symmetrical input of microphone amplifier
Receiving amplifier for dynamic or piezo-electric
earpieces
Automatic line loss compensation
MCU controlled earphone gain 8 dB
Anti-clipping in transmit direction
Tone Ringer Interface
Adjustable volume via 2 bit D/A converter
Adjustable threshold
MCU power supply
Benefits
Low number of external components
Applications
Standard, telephones, fax machines
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