PROTECTION CIRCUITRY AND METHODS FOR AUDIO GROUND CIRCUITS
Self-grounded circuitry (10) includes a signal channel conducting an output voltage (VOUT1). A charge pump (2) powered by a reference voltage (VDD) produces a control voltage (VCP). The control signal is at a low level if the reference voltage is low and is boosted to a high level if the reference v...
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creator | ELWART, David H GRAVES, Christopher M HAROUN, Baher S VINAY, Vikas Suma |
description | Self-grounded circuitry (10) includes a signal channel conducting an output voltage (VOUT1). A charge pump (2) powered by a reference voltage (VDD) produces a control voltage (VCP). The control signal is at a low level if the reference voltage is low and is boosted to a high level if the reference voltage is high. A ground switch circuit (15) includes a depletion mode transistor (MP1) having a source coupled to the output voltage, a gate coupled to the control voltage, and a drain coupled to ground. The transistor includes a well region (4-1) and a parasitic substrate diode (D3-1). A negative voltage protection circuit (17-1) includes a depletion mode first protection transistor (MP3-1) having a drain coupled to the well region, a source coupled to a source of a depletion mode second protection transistor (MP4-1) having a drain coupled to the output voltage, the first and second protection transistors each having a gate coupled to the control voltage, and also includes a diode (MN1) coupled to charge the well region from the control voltage conductor to prevent distortion of the output voltage. |
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A charge pump (2) powered by a reference voltage (VDD) produces a control voltage (VCP). The control signal is at a low level if the reference voltage is low and is boosted to a high level if the reference voltage is high. A ground switch circuit (15) includes a depletion mode transistor (MP1) having a source coupled to the output voltage, a gate coupled to the control voltage, and a drain coupled to ground. The transistor includes a well region (4-1) and a parasitic substrate diode (D3-1). A negative voltage protection circuit (17-1) includes a depletion mode first protection transistor (MP3-1) having a drain coupled to the well region, a source coupled to a source of a depletion mode second protection transistor (MP4-1) having a drain coupled to the output voltage, the first and second protection transistors each having a gate coupled to the control voltage, and also includes a diode (MN1) coupled to charge the well region from the control voltage conductor to prevent distortion of the output voltage.</description><language>eng ; fre ; ger</language><subject>AMPLIFIERS ; BASIC ELECTRONIC CIRCUITRY ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; DEAF-AID SETS ; ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION ; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS ; PUBLIC ADDRESS SYSTEMS ; PULSE TECHNIQUE</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170301&DB=EPODOC&CC=EP&NR=3011756A4$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170301&DB=EPODOC&CC=EP&NR=3011756A4$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ELWART, David H</creatorcontrib><creatorcontrib>GRAVES, Christopher M</creatorcontrib><creatorcontrib>HAROUN, Baher S</creatorcontrib><creatorcontrib>VINAY, Vikas Suma</creatorcontrib><title>PROTECTION CIRCUITRY AND METHODS FOR AUDIO GROUND CIRCUITS</title><description>Self-grounded circuitry (10) includes a signal channel conducting an output voltage (VOUT1). A charge pump (2) powered by a reference voltage (VDD) produces a control voltage (VCP). The control signal is at a low level if the reference voltage is low and is boosted to a high level if the reference voltage is high. A ground switch circuit (15) includes a depletion mode transistor (MP1) having a source coupled to the output voltage, a gate coupled to the control voltage, and a drain coupled to ground. The transistor includes a well region (4-1) and a parasitic substrate diode (D3-1). A negative voltage protection circuit (17-1) includes a depletion mode first protection transistor (MP3-1) having a drain coupled to the well region, a source coupled to a source of a depletion mode second protection transistor (MP4-1) having a drain coupled to the output voltage, the first and second protection transistors each having a gate coupled to the control voltage, and also includes a diode (MN1) coupled to charge the well region from the control voltage conductor to prevent distortion of the output voltage.</description><subject>AMPLIFIERS</subject><subject>BASIC ELECTRONIC CIRCUITRY</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>DEAF-AID SETS</subject><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</subject><subject>GENERATION</subject><subject>LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS</subject><subject>PUBLIC ADDRESS SYSTEMS</subject><subject>PULSE TECHNIQUE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAKCPIPcXUO8fT3U3D2DHIO9QwJilRw9HNR8HUN8fB3CVZw8w9ScAx18fRXcA_yDwVKQJUF8zCwpiXmFKfyQmluBgU31xBnD93Ugvz41OKCxOTUvNSSeNcAYwNDQ3NTM0cTYyKUAACCdijX</recordid><startdate>20170301</startdate><enddate>20170301</enddate><creator>ELWART, David H</creator><creator>GRAVES, Christopher M</creator><creator>HAROUN, Baher S</creator><creator>VINAY, Vikas Suma</creator><scope>EVB</scope></search><sort><creationdate>20170301</creationdate><title>PROTECTION CIRCUITRY AND METHODS FOR AUDIO GROUND CIRCUITS</title><author>ELWART, David H ; GRAVES, Christopher M ; HAROUN, Baher S ; VINAY, Vikas Suma</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP3011756A43</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2017</creationdate><topic>AMPLIFIERS</topic><topic>BASIC ELECTRONIC CIRCUITRY</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>DEAF-AID SETS</topic><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</topic><topic>GENERATION</topic><topic>LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS</topic><topic>PUBLIC ADDRESS SYSTEMS</topic><topic>PULSE TECHNIQUE</topic><toplevel>online_resources</toplevel><creatorcontrib>ELWART, David H</creatorcontrib><creatorcontrib>GRAVES, Christopher M</creatorcontrib><creatorcontrib>HAROUN, Baher S</creatorcontrib><creatorcontrib>VINAY, Vikas Suma</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ELWART, David H</au><au>GRAVES, Christopher M</au><au>HAROUN, Baher S</au><au>VINAY, Vikas Suma</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROTECTION CIRCUITRY AND METHODS FOR AUDIO GROUND CIRCUITS</title><date>2017-03-01</date><risdate>2017</risdate><abstract>Self-grounded circuitry (10) includes a signal channel conducting an output voltage (VOUT1). A charge pump (2) powered by a reference voltage (VDD) produces a control voltage (VCP). The control signal is at a low level if the reference voltage is low and is boosted to a high level if the reference voltage is high. A ground switch circuit (15) includes a depletion mode transistor (MP1) having a source coupled to the output voltage, a gate coupled to the control voltage, and a drain coupled to ground. The transistor includes a well region (4-1) and a parasitic substrate diode (D3-1). A negative voltage protection circuit (17-1) includes a depletion mode first protection transistor (MP3-1) having a drain coupled to the well region, a source coupled to a source of a depletion mode second protection transistor (MP4-1) having a drain coupled to the output voltage, the first and second protection transistors each having a gate coupled to the control voltage, and also includes a diode (MN1) coupled to charge the well region from the control voltage conductor to prevent distortion of the output voltage.</abstract><oa>free_for_read</oa></addata></record> |
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subjects | AMPLIFIERS BASIC ELECTRONIC CIRCUITRY CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS PULSE TECHNIQUE |
title | PROTECTION CIRCUITRY AND METHODS FOR AUDIO GROUND CIRCUITS |
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