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• W1989969646 abstract "The paper presents the design of a low-noise preamplifier dedicated for condenser measurement microphones used in high sensitivity applications, in which amplifier noise is the main factor limiting sensitivity of the measurements. In measurement microphone preamplifiers, the dominant source of noise at lower frequencies is the bias resistance of the input stage. In the presented solution, resistors were connected to the input stage by means of switches. The switches are opened during measurements, which disconnects the resistors from the input stage and results in noise reduction. Closing the switches allows for fast charging of the microphone capacitance. At low frequencies the noise of the designed preamplifier is a few times lower in comparison to similar, commercially available instruments." @default.
• W1989969646 created "2016-06-24" @default.
• W1989969646 creator A5003491246 @default.
• W1989969646 date "2010-12-01" @default.
• W1989969646 modified "2023-09-27" @default.
• W1989969646 title "Ultra-low-noise preamplifier for condenser microphones" @default.
• W1989969646 cites W1964623678 @default.
• W1989969646 cites W2027482748 @default.
• W1989969646 doi "https://doi.org/10.1063/1.3505110" @default.
• W1989969646 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21198039" @default.
• W1989969646 hasPublicationYear "2010" @default.
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