The present invention provides a semiconductor integrated circuit device and a communication device incorporating same. Two MOS (strong and weak) devices are connected to each control input of a transceiver. Both MOS devices are turned on while the supply voltage is ramping from 0V. The strong device remains on for a period of 10-20 microseconds. The strong MOS device pulls the input to a disabled state against external capacitance which is attempting to pull the input to an enabled state. The weak MOS device remains on while pulling the input to a disabled state. The input is pulled to an enabled state when an external source overcomes the weak MOS device. Once the control input is pulled beyond the input voltage threshold to the enabled state, the weak MOS device will be turned off permanently and the input will revert to a standard CMOS input with infinite input resistance.
Auto-Gain Correction And Common Mode Voltage Cancellation In A Precision Amplifier
Richard Edward Boucher - Santa Clara CA, US Johan Hendrik Huijsing - Schipluiden, NL
Assignee:
Maxim Integrated Products, Inc. - Sunnyvale CA
International Classification:
H03F 1/02
US Classification:
330 9, 330 51
Abstract:
Auto-gain correction in a precision amplifier provides continuous calibration of the gain of the two differential input stages relative to each other and thus significantly minimizes the effects of device mismatch and temperature. Auto-gain correction together with auto-zero minimizes the effects of common mode input voltage on the amplifier and eliminates the need for trim associated with the matching of the two differential input stages. Improved gain matching enhances the accuracy of the auto-zero, which further improves the accuracy of auto-gain correction, resulting in a synergy with both operating together. The implementation of the auto-zero using an input pair of series capacitors in conjunction with a common input reference and a feedback pair of series capacitors in conjunction with a common feedback reference provides for decoupling the common mode voltage of the input differential pair or feedback differential pair. Various features may be used in sub-combinations as desired.
Self Configuring Output Stages Of Precision Amplifiers
Self configuring output stages of precision amplifiers that remain linear when operating into a load that may have a ground reference below the amplifier ground reference, that maintain full amplifier gain while approaching zero output, and that can provide a zero output even when operating into a load that may have a ground reference below the amplifier ground reference, that has a self configuring output stage operable with either a mid-rail or ground reference below amplifier ground, and which maintain a high output impedance when not selected even when the output is above the amplifier supply voltage, or when not powered, thereby allowing amplifier outputs from un-powered amplifiers or amplifiers operating at lower supply voltages to be connected in common for multiplexing to a common load.
The invention is a means for ensuring full current flow in the "forward" direction in a MOS transistor, and substantially reducing (and/or eliminating) current flow in the "reverse" direction. The forward voltage drop and reverse current are controllable and are determined by ratios of device size. In one embodiment, the present invention is a circuit coupled to an output stage transistor having an output voltage thereon to ensure current flow in one direction and to throttle current flow in a reverse direction. The circuit includes a first circuit coupled to the output transistor to progressively turn off the same as the output voltage reaches a first threshold voltage and approaches a rail voltage. The circuit further includes a second circuit coupled to the output transistor to turn off the same as the output voltage reaches a second threshold voltage where the second threshold voltage is greater than the rail voltage.
Dr. Boucher graduated from the Universidad Autu00F3noma de Guadalajara, Guadalajara, Jalisco, Mexico in 1978. He works in Fullerton, CA and specializes in Family Medicine.
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Honolulu, HI Kellits, Clarendon, Jamaica, West Indies Jacksonville, Oregon Palo Alto, CA Chula Vista, CA San Luis Obispo, CA Santa Barbara, CA Townsend, MA
Work:
Hewlett-Packard KPMG Consulitng Varian, Inc.
Education:
University of California, Santa Cruz, Cow Poly San Luis Obispo
About:
Collaboration Service Manager for Hewlett-PackardThat means I own Sharepoint for 400,000 delighted customers!
Port ElizabethTables Shift manager at Sun International Past: Acting Assistant Tables manager at Sun International, Area Surveillance / Security manager... Born to fish, forced to work
infections are seeded, then the widespread use of masks to protect the nasal passages, as well as any therapeutic strategies that reduce virus in the nose, such as nasal irrigation or antiviral nasal sprays, could be beneficial," study co-author Dr. Richard Boucher said in a university news release.
Date: Jun 09, 2020
Category: More news
Source: Google
Researchers map SARS-CoV-2 infection in cells of nasal cavity, bronchia, lungs
initial site from which lung infections are seeded, then the widespread use of masks to protect the nasal passages, as well as any therapeutic strategies that reduce virus in the nose, such as nasal irrigation or antiviral nasal sprays, could be beneficial," said study co-senior author Richard Boucher
A large crowd of us gathered for the briefing given by the State Department spokesman Richard Boucher. Questions about the encounter flew from the floor. He looked a little sheepish, and explained that it was an informal get-together, during a coffee break, which had lasted just 15 minutes.
We would certainly welcome any real willingness to move forward on peace with Israel and peace in the region, spokesman Richard Boucher said Thursday. But again, make clear that its hard to reconcile those kind of statements with the support for violent groups that are trying to kill the dreams
Date: Jun 11, 2013
Category: World
Source: Google
China stimulus unnecessary, risks long-term damage
"I don't think we're back in that kind of acute crisis phase," Richard Boucher, deputy secretary general of the Paris-based Organisation for Economic Co-operation and Development (OECD), told Reuters.
Date: May 30, 2012
Category: Business
Source: Google
Obstacles that are holding back growth at a time of transition
region, open up the economies the way the people have opened up the governments. That is the overriding imperative," said Richard Boucher, the deputy secretary general of the Organisation for Economic Co-operation and Development in Paris, which produced the report with the World Economic Forum (WEF).
Date: Oct 22, 2011
Category: World
Source: Google
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