A Broadband Test Setup for Differential Mode Measurement of Infrared Photodiodes in TO-8 Package
Michał Abramowicz , Wojciech Wiatr
AbstractWe present a test setup for broadband balanced characterization of infrared photodiodes mounted inside TO-8 package. The test setup is composed of a four-port detector test fixture, a broadband three-port balun, a pair of bias networks and a pair of short SMA semirigid cables. It is dedicated for noise spectral density measurements and time-domain optoelectrical measurements involving impulse laser light stimulation. To provide high common mode rejection ratio (CMRR), we pursue symmetry in the test setup by carefully selecting a way the setup elements are assembled so as minimize impact of signal imbalance. We employ a vector network analyzer to verify properties of our three-port test setup by comparing two groups of its scattering parameters: one simulated with ADS software using S-matrices individually measured for each setup element and the other one determined from one-port calibration measurements in the test setup with tiny short-openload calibration standards mounted on a TO-8 header. According to obtained results, the test setup provides the CMRR over 40 dB in the bandwidth extending from 100 kHz up to 3 GHz.
|Publication size in sheets||0.5|
|Book||Proc. MIKON 2018, 2018, Fundacja Mikrofal i Radiolokacji MIKON, ISBN 978-83-949421-0-6|
|Keywords in English||microwave measurements, balanced circuits, balun, differential signaling, circuit simulation, common mode rejection ratio, vector network analyzer (VNA), calibration|
|Score|| = 15.0, BookChapterMatConf|
= 15.0, BookChapterMatConf
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