1. A Fully-Integrated Optoelectronic Detector With High Gain Bandwidth Product
- Author
-
Ze-Kun Zhou, Yun-Kun Wang, Hong-Guo Gong, Yue Shi, Zhuo Wang, and Bo Zhang
- Subjects
Fully-integrated optoelectronic detector ,high-bandwidth ,high-gain ,transimpedance amplifier ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
An optoelectronic circuit integrated with a photodiode is proposed, which simultaneously achieves 3.5-MΩ transimpedance gain and 18-MHz bandwidth. The design is intended to address the limits on bandwidth introduced by the large parasitic capacitance of the integrated photodiodes in optoelectronic applications. The proposed circuit consists of a transimpedance amplifier (TIA) and a voltage gain stage. The pre-stage TIA with low input impedance provides the main transimpedance gain of the circuit over a wide bandwidth. The post voltage gain stage provides the supplemental voltage gain for the circuit and increases its driving capability. The circuit is fabricated in a 0.5-μm CMOS process with an active area of 501.2 μm × 291.6 μm. When the light input is a 100-ns pulse with 905-nm wavelength and 1.5-μW optical power, the amplitude of output signal is 1.6 V with a rise time of 24.5 ns and a delay time of 21 ns.
- Published
- 2019
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