CMRR Phoenicia Sign
CMRR may stand for: * Catskill Mountain Railroad, operators of the former New York Central Railroad Catskill Mountain Branch from Kingston to Phoenicia * Central Massachusetts Railroad, former railroad forming part of the Boston and Maine Railroad system * Common-mode rejection ratio, measure of the capability of an instrument to reject a signal that is common to both input leads * Chemistry and Metallurgy Research Replacement Facility The Chemistry and Metallurgy Research Replacement Facility, usually referred to as the CMRR, is a facility under construction at Los Alamos National Laboratory in New Mexico which is part of the United States' nuclear stockpile stewardship program ...

Catskill Mountain Railroad
The Catskill Mountain Railroad is a heritage tourist railroad based in Kingston, New York, that began operations in 1982. The railroad leases a 4.7-mile portion (MP 3.6 to MP 8.3) of the former New York Central Railroad Catskill Mountain branch from Kingston to Stony Hollow, New York. The tracks are owned by Ulster County, New York, which bought them in 1979 from the bankruptcy estate of the Penn Central Railroad. The railroad's current permit with Ulster County expires on December 31, 2023. Current Operations CMRR currently operates on approximately 4.5 miles of track of the former Ulster and Delaware Railroad from Kingston to Stony Hollow, New York. CMRR's Kingston station is at Westbrook Lane, near the Kingston Plaza Shopping Center, and ends just east of the Route 28A crossing in Stony Hollow, New York. CMRR operates a variety of trains. The season begins with thEaster Bunny Expressin the spring, with regular runs until Christmas of each year. Currently, in the su ...
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Central Massachusetts Railroad
The Central Massachusetts Railroad was a railroad in Massachusetts. The eastern terminus of the line was at North Cambridge Junction where it split off from the Middlesex Central Branch of the Boston and Lowell Railroad in North Cambridge and through which it had access to North Station in Boston. From there, the route ran 98.77 miles west through the modern-day towns of Belmont, Waltham, Weston, Wayland, Massachusetts, Wayland, Sudbury, Massachusetts, Sudbury, Hudson, Massachusetts, Hudson, Bolton, Massachusetts, Bolton, Berlin, Massachusetts, Berlin, Clinton, Massachusetts, Clinton, West Boylston, Massachusetts, West Boylston, Holden, Massachusetts, Holden, Rutland, Massachusetts, Rutland, Oakham, Massachusetts, Oakham, Barre, Massachusetts, Barre, New Braintree, Massachusetts, New Braintree, Hardwick, Massachusetts, Hardwick, Ware, Massachusetts, Ware, Palmer, Massachusetts, Palmer, Belchertown, Massachusetts, Belchertown, Amherst, Massachusetts, Amherst, and Hadley, Mass ...
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Common-mode Rejection Ratio
In electronics, the common mode rejection ratio (CMRR) of a differential amplifier (or other device) is a metric used to quantify the ability of the device to reject common-mode signals, i.e. those that appear simultaneously and in-phase on both inputs. An ideal differential amplifier would have infinite CMRR, however this is not achievable in practice. A high CMRR is required when a differential signal must be amplified in the presence of a possibly large common-mode input, such as strong electromagnetic interference (EMI). An example is audio transmission over balanced line in sound reinforcement or recording. Theory Ideally, a differential amplifier takes the voltages, V_+ and V_- on its two inputs and produces an output voltage V_\mathrm=A_\mathrm(V_+ - V_-), where A_\mathrm is the differential gain. However, the output of a real differential amplifier is better described as : :V_ = A_\mathrm (V_+ - V_-) + \tfrac A_\mathrm (V_+ + V_-) where A_\mathrm is the "common-mode gai ...
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