Abstract:
We present a single-flux-quantum (SFQ)-based digital-to-analog converter (DAC) generating bipolar output voltages, in which the key component is a polarity-switchable dou...Show MoreMetadata
Abstract:
We present a single-flux-quantum (SFQ)-based digital-to-analog converter (DAC) generating bipolar output voltages, in which the key component is a polarity-switchable double-flux-quantum amplifier (PS-DFQA). The DAC comprised a dc/SFQ converter, an 8-bit variable pulse-number multiplier (PNM), and a ±8-fold PS-DFQA integrated on a single chip. SFQ pulse-frequency modulation was employed to realize variable output voltage amplitude, for which the multiplication factor of the variable-PNM was controlled by a commercial data generator situated at room temperature. The variable-PNM realized 8-bit resolution with a multiplication factor between 0 and 255. Bias currents fed to the ±8-fold PS-DFQA were polarity switched in synchronization with the digital code for the variable-PNM. The whole circuits including I/O elements were designed using SFQ cell libraries, and fabricated using a niobium integration process. Sinusoidal bipolar voltage waveform of 0.38 mVpp was demonstrated using a reference signal source of 43.94 MHz.
Published in: IEEE Transactions on Applied Superconductivity ( Volume: 27, Issue: 4, June 2017)
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- IEEE Keywords
- Index Terms
- Analog-to-digital Converter ,
- Multiple Factors ,
- Reference Signal ,
- Sinusoidal Waveform ,
- Bias Current ,
- Single Chip ,
- Sinusoidal Voltage ,
- Digital Code ,
- Bipolar Voltage ,
- Signal Propagation ,
- Negative Voltage ,
- Circuit Design ,
- Positive Voltage ,
- Repetition Frequency ,
- Half Of Period ,
- Average Voltage ,
- Polarization Switching ,
- Josephson Junctions ,
- Flux Quantum ,
- Noise Spikes
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Analog-to-digital Converter ,
- Multiple Factors ,
- Reference Signal ,
- Sinusoidal Waveform ,
- Bias Current ,
- Single Chip ,
- Sinusoidal Voltage ,
- Digital Code ,
- Bipolar Voltage ,
- Signal Propagation ,
- Negative Voltage ,
- Circuit Design ,
- Positive Voltage ,
- Repetition Frequency ,
- Half Of Period ,
- Average Voltage ,
- Polarization Switching ,
- Josephson Junctions ,
- Flux Quantum ,
- Noise Spikes
- Author Keywords