Fig. 1. Weighted resistor network

Fig. 2. MR at different states. (a) MR in detuned state; (b) MR in resonance state

Fig. 3. MR structure and its transmission curve diagram. (a) MR structure and its parameter configuration; (b) transmission curves of "drop" port before and after EO tuning

Fig. 4. Schematic diagrams of optical waveguide with integrated GST. (a) Schematic diagram of optical waveguide structure; (b) schematic diagram of cross-section of optical waveguide

Fig. 5. Effect of GST with different crystallization rate on transmittance of optical waveguides. (a) Schematic diagram of electric field intensity in waveguide; (b) transmittance change of waveguide

Fig. 6. N- bit PDAC based on MR and photonic PCM

Fig. 7. Test diagram of 4-bit PDAC based on MR and photonic PCM

Fig. 8. Insertion loss of MR under different input digital signals. (a) Modulation signal is "0011"; (b) modulation signal is "1100"; (c) modulation signal is "0101"; (d) modulation signal is "1010"

Fig. 9. Numerical simulation results. (a) Modulation signal of MR₁; (b) modulation signal of MR₂; (c) modulation signal of MR₃; (d) modulation signal of MR₄; (e) simulation results of PDAC based on MR and splitters; (f) simulation results of proposed PDAC based on MR and GST

Fig. 10. Analog output and linear fitting under different input digital signals

Fig. 11. Waveform quantization shapes and filtered waveforms generated by configuring input signal. (a)(d) Square wave; (b)(e) sawtooth wave; (c)(f) triangle wave

Fig. 12. Simulation results of ENOB. (a) Quantized output by configuring input signal; (b) filtered output sine waves