Abstract
The treatment of inoperable cancers in the therapy terminal in Lanzhou-China, which is located at the Institute of Modern Physics (IMP), permits to work on the actual front-end readout. The availability of detailed noise spectral density characteristics for the OPA amplifier helps to develop the noise error analysis for high-resolution. This work focused on the noise model of the detector-preamplifier, which presents the low noise circuit schematic of the Transimpedance (TIA). Considering the parasitical influences, we develop a new approach to detect the weak signals based on resonant frequency, 1/√L1 (C1+CGS). In addition, the system eliminates leakage current in the reset switch and reduces the charge injection occur from the switches in the Gated Integrator (GI) and the configuration switch is made especially with two transmission gates switches, in series, with a grounded MOS switch, attached to the node between the two transmission gates switches and the linearity almost good.
Highlights
The optical receiver front-end plays an important role in transmission systems and the sensitivity of the receiver usually suffer by the impact of different noise factors
Since 2006 at Institute of Modern Physics, Lanzhou, beams of heavy-charged particles like carbon ions have encouraged the research of measurement structures and these beams have been used to the treatment of inoperable tumors with different detector arrays of silicon strip detectors (Zhou et al, 2012)
The high degree of linearity was achieved by using a new configuration switch, which eliminated leakage current and reduced the charge injection from switches in the Gated Integrator (GI) to 0.3mV
Summary
The optical receiver front-end plays an important role in transmission systems and the sensitivity of the receiver usually suffer by the impact of different noise factors. We will develop the configuration switch of gated integrator based on reduction leakage current, charge injection and the noise prevention.
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