A 3μm-CMOS Analogue Audio Circuit for Mobile Telephone Application
An analogue IC for mobile telephone application (Handset IC) is presented. The circuit performs the analogue functions required for the speech channels (low noise microphone amplifier, earphone driver for 130 nF load, sidetone buffer, transmit line driver, speaker line drivers, variable gain-loss st...
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| creator | Melcher, Gebhard Guerrero, Francisco Barnthaler, Hannes Ilzer, Karl Strle, Drago Groenroos, Mika |
| description | An analogue IC for mobile telephone application (Handset IC) is presented. The circuit performs the analogue functions required for the speech channels (low noise microphone amplifier, earphone driver for 130 nF load, sidetone buffer, transmit line driver, speaker line drivers, variable gain-loss stage) and DTMF generation. A buzzer driver has also been integrated for general purpose system signalling. A watchdog circuit supervises the correct functioning of the microprocessor. Common time-continuous and switch-capacitor techniques have been used to minimize the number of external components. |
| doi_str_mv | 10.1109/ESSCIRC.1989.5468091 |
| format | Conference Proceeding |
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The circuit performs the analogue functions required for the speech channels (low noise microphone amplifier, earphone driver for 130 nF load, sidetone buffer, transmit line driver, speaker line drivers, variable gain-loss stage) and DTMF generation. A buzzer driver has also been integrated for general purpose system signalling. A watchdog circuit supervises the correct functioning of the microprocessor. 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The circuit performs the analogue functions required for the speech channels (low noise microphone amplifier, earphone driver for 130 nF load, sidetone buffer, transmit line driver, speaker line drivers, variable gain-loss stage) and DTMF generation. A buzzer driver has also been integrated for general purpose system signalling. A watchdog circuit supervises the correct functioning of the microprocessor. Common time-continuous and switch-capacitor techniques have been used to minimize the number of external components.</description><subject>Analog integrated circuits</subject><subject>Application specific integrated circuits</subject><subject>Driver circuits</subject><subject>Integrated circuit noise</subject><subject>Low-noise amplifiers</subject><subject>Microphones</subject><subject>Noise generators</subject><subject>Speech enhancement</subject><subject>Telephone sets</subject><subject>Telephony</subject><isbn>3854031017</isbn><isbn>9783854031017</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>1989</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNpjYJAxNNAzNDSw1HcNDnb2DHLWM7S0sNQzNTGzMLA0ZGbgMrYwNTEwNjQwNOdg4C0uzjIAAhNjUxNjS04GZ0cF43N7cnWdff2DFRzzEnPy00tTFRxLUzLzFZwzi5JLM0sU0vKLFHzzkzJzUhVCUnNSCzLy84BKCgpyMpMTSzLz83gYWNMSc4pTeaE0N4O0m2uIs4duZmpqanxBUWZuYlFlPNQ9xvhlAdaqOjU</recordid><startdate>198909</startdate><enddate>198909</enddate><creator>Melcher, Gebhard</creator><creator>Guerrero, Francisco</creator><creator>Barnthaler, Hannes</creator><creator>Ilzer, Karl</creator><creator>Strle, Drago</creator><creator>Groenroos, Mika</creator><general>IEEE</general><scope>6IE</scope><scope>6IL</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIL</scope></search><sort><creationdate>198909</creationdate><title>A 3μm-CMOS Analogue Audio Circuit for Mobile Telephone Application</title><author>Melcher, Gebhard ; Guerrero, Francisco ; Barnthaler, Hannes ; Ilzer, Karl ; Strle, Drago ; Groenroos, Mika</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-ieee_primary_54680913</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>1989</creationdate><topic>Analog integrated circuits</topic><topic>Application specific integrated circuits</topic><topic>Driver circuits</topic><topic>Integrated circuit noise</topic><topic>Low-noise amplifiers</topic><topic>Microphones</topic><topic>Noise generators</topic><topic>Speech enhancement</topic><topic>Telephone sets</topic><topic>Telephony</topic><toplevel>online_resources</toplevel><creatorcontrib>Melcher, Gebhard</creatorcontrib><creatorcontrib>Guerrero, Francisco</creatorcontrib><creatorcontrib>Barnthaler, Hannes</creatorcontrib><creatorcontrib>Ilzer, Karl</creatorcontrib><creatorcontrib>Strle, Drago</creatorcontrib><creatorcontrib>Groenroos, Mika</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Melcher, Gebhard</au><au>Guerrero, Francisco</au><au>Barnthaler, Hannes</au><au>Ilzer, Karl</au><au>Strle, Drago</au><au>Groenroos, Mika</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>A 3μm-CMOS Analogue Audio Circuit for Mobile Telephone Application</atitle><btitle>ESSCIRC '89: Proceedings of the 15th European Solid-State Circuits Conference</btitle><stitle>ESSCIRC</stitle><date>1989-09</date><risdate>1989</risdate><spage>204</spage><epage>207</epage><pages>204-207</pages><isbn>3854031017</isbn><isbn>9783854031017</isbn><abstract>An analogue IC for mobile telephone application (Handset IC) is presented. The circuit performs the analogue functions required for the speech channels (low noise microphone amplifier, earphone driver for 130 nF load, sidetone buffer, transmit line driver, speaker line drivers, variable gain-loss stage) and DTMF generation. A buzzer driver has also been integrated for general purpose system signalling. A watchdog circuit supervises the correct functioning of the microprocessor. Common time-continuous and switch-capacitor techniques have been used to minimize the number of external components.</abstract><pub>IEEE</pub><doi>10.1109/ESSCIRC.1989.5468091</doi></addata></record> |
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| identifier | ISBN: 3854031017 |
| ispartof | ESSCIRC '89: Proceedings of the 15th European Solid-State Circuits Conference, 1989, p.204-207 |
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| language | eng |
| recordid | cdi_ieee_primary_5468091 |
| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Analog integrated circuits Application specific integrated circuits Driver circuits Integrated circuit noise Low-noise amplifiers Microphones Noise generators Speech enhancement Telephone sets Telephony |
| title | A 3μm-CMOS Analogue Audio Circuit for Mobile Telephone Application |
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