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U4090B-N Datasheet

  • U4090B-N

  • U4090B-N [Updated 9/03. 34 Pages]

  • 594.32KB

  • 34頁

  • ETC

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Features
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DC Characteristic Adjustable
Transmit and Receive Gain Adjustable
Symmetrical Input of Microphone Amplifier
Anti-clipping in Transmit Direction
Automatic Line-loss Compensation
Symmetrical Output of Earpiece Amplifier
Built-in Ear Protection
DTMF and MUTE Input
Adjustable Sidetone Suppression Independent of Sending
and Receiving Amplification
Speech Circuit with Two Sidetone Networks
Built-in Line Detection Circuit
Integrated Amplifier for Loud-hearing Operation
Anti-clipping for Loudspeaker Amplifier
Improved Acoustical Feedback Suppression
Power Down
Voice Switch
Tone Ringer Interface with DC/DC Converter
Zero Crossing Detection
Common Speaker for Loud-hearing and Tone Ringer
Supply Voltages for all Functional Blocks of a Subscriber Set
Integrated Transistor for Short-circuiting the Line Voltage
Answering Machine Interface
Operation Possible from 10 mA Line Currents
Monolithic
Integrated
Feature Phone
Circuit
U4090B-N
Applications
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Feature Phone
Answering Machine
Fax Machine
Speaker Phone
Benefits
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Savings of One Piezoelectric Transducer
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Complete System Integration of Analog Signal Processing on One Chip
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Very Few External Components
Description
The microcontroller-controlled telephone circuit U4090B-N is a linear integrated circuit
for use in feature phones, answering machines and fax machines. It contains the
speech circuit, tone ringer interface with DC/DC converter, sidetone equivalent and
ear protection rectifiers. The circuit is line powered and contains all components nec-
essary for amplification of signals and adaptation to the line.
An integrated voice switch with loudspeaker amplifier allows loud-hearing or hands-
free operation. With an anti-feedback function, acoustical feedback during loud-hear-
ing can be reduced significantly. The generated supply voltage is suitable for a wide
range of peripheral circuits.
Rev. 4740A鈥揅ORD鈥?9/03

U4090B-N相關型號PDF文件下載

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  • 英文版
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  • 英文版
    U4090B-N [Updated 9/03. 34 Pages]
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  • 英文版
    Multi-standard feature phone circuit with voice switch 
  • 英文版
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    U4091BM-N [Updated 2/03. 38 Pages] Multi-standard feature ph...
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  • 英文版
    PROGRAMMABLE TELEPHONE AUDIO PROCESSOR
    ATMEL [ATM...
  • 英文版
    PROGRAMMABLE TELEPHONE AUDIO PROCESSOR
    ATMEL
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    Monolithic Integrated Feature Phone Circuit
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  • 英文版
    Telephone Circuit (Support)
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