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A Lock-In Amplifier For Fluorescent Light Detection, Osman Oguz
A Lock-In Amplifier For Fluorescent Light Detection, Osman Oguz
Masters Theses
An integrated on-chip lock-in amplifier has been developed for fluorescent light detection for biological applications. The system includes 2.1 mm x 2.1 mm tiny chip using a photodiode transimpedance amplifier topology for the pre-amp, followed by gain amplifier, demodulator and filtering stages. Synchronous demodulator or phase sensitive detector stage has two different architectures to demonstrate the difference between the results. The recommended transmitting light frequency is between 0.5 kHz to 5 kHz. We used 1 kHz frequency for the test.
Complementary Bodydriving - A Low-Voltage Analog Circuit Technique Realized In 0.35um Soi Process, Yong Leekee
Complementary Bodydriving - A Low-Voltage Analog Circuit Technique Realized In 0.35um Soi Process, Yong Leekee
Masters Theses
This thesis presents a study of several analog circuit primitives that utilize the body terminal as a signal port to achieve low-voltage operation and high performance. Several issues relating to low-voltage applications as well as the trends of technology scaling in the near future are presented. Principles of the body-driven transistor for both PMOS and NMOS in PDSOI technology are described, and critical design considerations are discussed. The design of low-voltage analog primitives (cascode current mirror and differential pair) are described and analyzed in detail. A discussion of the design and analysis of a 4-quadrant analog multiplier is also presented. …