title: Frequency multiplexer for ultrasonic Doppler blood flow signals.
abstract: An instrument is described which uses single-sideband techniques to combine two channels of Doppler flow signals into a form suitable for simultaneous processing by a single-channel real-time spectral analyzer. The maximum input frequency range is 50 Hz to 10 kHz.
authors.affiliation: Department of Mechanical Engineering, The University of Auckland, Auckland, New Zealand.
authors.forename: F J
authors.initials: FJ
authors.lastname: Thomson
mesh_terms: D001783:Blood Flow Velocity; D004553:Electric Conductivity; D001330:Electronic Data Processing; D004582:Electronics, Medical / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D017078:Laser-Doppler Flowmetry / Q000295:instrumentation* / Q000379:methods*; D009991:Oscillometry; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors