High-speed CMOS monolithically integrated optical receiver with full bandwidth single-ended-to-differential
A single-ended to differential, monolithic integration technology, applied in the direction of electromagnetic receivers, can solve problems such as difficult to find, achieve the effect of reducing the number of uses, shielding the Miller effect, and improving bandwidth
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Embodiment 1
[0041] A high-speed CMOS monolithic integrated optical receiver with full bandwidth single-ended to differential, see figure 1 , this high-speed CMOS monolithic integrated optical receiver includes:
[0042] The high-bandwidth adjustable cascode transimpedance amplifier 1 is used to convert the current signal output by the photodetector into a voltage signal for preliminary amplification;
[0043] A single-ended to differential converter 2 with a negative capacitance circuit is used to realize single-ended to differential conversion, improve bandwidth and amplify voltage signals;
[0044] The DC offset elimination unit 3 is used to eliminate the DC offset of the interleaved active feedback limiting amplifier 4 caused by the unbalanced signal output by the single-ended to differentiator 2, so that the common mode of the interleaved active feedback limiting amplifier 4 The level is consistent;
[0045] The interleaved active feedback limiting amplifier 4 is used to amplify the...
Embodiment 2
[0056] In order to more clearly describe the structure and working principle of the high-bandwidth RGC transimpedance amplifier 1 proposed by the present invention, and highlight the many advantages of the high-bandwidth RGC transimpedance amplifier 1 designed by the present invention compared with the traditional RGC transimpedance amplifier, the following briefly describes The working principle of the traditional RGC transimpedance amplifier, and then describe the working principle of the high-bandwidth RGC transimpedance amplifier 1 in detail from the aspects of expanding bandwidth and reducing noise.
[0057] The present invention comprehensively utilizes the following four technologies to expand the bandwidth, that is, cascode feedback channel reduces input impedance, Miller capacitance "shielding" effect, Butterworth LC ladder matching network and π-type broadband matching network. Among them, the Butterworth LC ladder matching network can effectively reduce the equivalen...
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