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The floating capacitor as a differential building block
Gasulla Forner, Manuel; Jordana Barnils, José; Pallàs Areny, Ramon; Torrents Dolz, Josep M.
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. IEB - Instrumentació Electrònica i Biomèdica
This paper analyzes the advantages and limitations of using the floating- (or flying-) capacitor technique as a building block with differential input and either differential or single-ended output to implement voltage amplifiers, multiplexers, and coherent amplitude demodulators. Theoretical analysis, supported by experimental results, shows that the fully differential configuration has a better common-mode rejection ratio (CMRR). However, if the output signal, once amplified, must be single ended, then it may be better to have a floating capacitor with single-ended output in amplifiers and some multiplexers whereas in demodulators a floating capacitor with differential output yields a better CMRR.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica
Signal processing
Amplifiers (Electronics)
Capacitor switching
Data acquisition
Differential amplifiers
Differential detection
Differential building block
Differential input
Differential output yields
Floating capacitor
Common-mode rejection ratio
Multiplexing equipment
Signal processing equipment
Coherent amplitude demodulators
Sampling
Synchronous detection
Voltage amplifiers
CMRR
Processament del senyal
Adquisició de dades
Amplificadors (Electrònica)
Article
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
         

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