Xingchi Chen, Xiaonan Yu, Shoufeng Tong, Baiqiu Zhao. An Investigation on a Pulse-Shaping Circuit in Lidar Systems[J]. Laser & Optoelectronics Progress, 2020, 57(19): 192804
- Laser & Optoelectronics Progress
- Vol. 57, Issue 19, 192804 (2020)
Fig. 1. Relationship between detection distance and received power of detector
Fig. 2. Effects of echo pulse amplitudes on judgment results
Fig. 3. Schematic of laser ranging system. (a) Overall block diagram of laser ranging system; (b) picture of laser ranging system
Fig. 4. Differential circuit used in peak detection. (a) Schematic of differential circuit; (b) output waveform of differential circuit
Fig. 5. Schematic of peak detection shaping method
Fig. 6. Waveform analysis of peak detection shaping circuit
Fig. 7. Schematic of constant-ratio timing pulse shaping under different input signal amplitudes. (a) Unsaturated input signal; (b) saturated input signal
Fig. 8. Waveform analysis of constant-ratio timing shaping circuit
Fig. 9. Input signal of peak detection circuit. (a) Received and amplified signal in the peak detection circuit; (b) signal after differential circuit
Fig. 10. Output signal of peak detection circuit. (a) PECL signal output by the comparator in the peak detection circuit; (b) TTL signal output by the shaping module in the peak detection circuit
Fig. 11. Test results of constant-ratio timing circuit. (a) PECL signal output by the comparator in the constant-ratio timing circuit; (b) TTL signal output by the shaping module in the constant-ratio timing circuit
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Table 1. Test data of laser ranging system using peak detection circuit
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Table 2. Test data of laser ranging system using a constant-ratio timing circuit
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