17:15 〜 18:45
[PCG20-P04] Development of an analog integrated circuit specialized for plasma wave receiver onboard spacecraft
キーワード：プラズマ波動受信器、ASIC
Plasma waves are an essential target for understanding the electromagnetic environment in space. Thus, plasma wave observations by scientific satellites have been carried out. Plasma wave receivers require high-quality analog circuits to process weak signals, and it leads to an increase in the size of the receiver. On the other hand, the miniaturization of satellites and the diversification of observation targets have led to a strong demand for miniaturization of onboard instruments. Therefore, we are currently developing an Application Specific Integrated Circuits (ASICs) to reduce the size of the analog circuit, which occupies a large part of the plasma wave receiver.
The ASIC includes a band-limiting filter, a main amplifier, and an anti-aliasing filter. The settings of these circuits are selectable by an external signal, allowing the use of the appropriate analog circuit for the receiver's purpose. For the band-limiting filter, the high-pass filter setting can be selected from no high-pass filter, 1 kHz cutoff frequency, and 10 kHz cutoff frequency, and for the anti-aliasing filter, the cutoff frequency can be selected from 1 kHz, 10 kHz, and 100 kHz. The gain of the main amplifier can be selected from 0 dB, 20 dB, and 40 dB. It is expected that six channels of such circuits can be implemented on a 5 mm x 5 mm chip. This will allow the analog circuits for observing all components of the electromagnetic field to be realized on a single ASIC chip, which will make it possible to significantly reduce the size of the receiver. In addition to that, the ASIC allows for flexible configurations in the receiver even when six-component circuitry is not required. For example, it enables to assign another analog circuit to waveform and spectrum observation without increasing the circuit area.
In this presentation, we present the detailed design and performance of the current ASIC.
The ASIC includes a band-limiting filter, a main amplifier, and an anti-aliasing filter. The settings of these circuits are selectable by an external signal, allowing the use of the appropriate analog circuit for the receiver's purpose. For the band-limiting filter, the high-pass filter setting can be selected from no high-pass filter, 1 kHz cutoff frequency, and 10 kHz cutoff frequency, and for the anti-aliasing filter, the cutoff frequency can be selected from 1 kHz, 10 kHz, and 100 kHz. The gain of the main amplifier can be selected from 0 dB, 20 dB, and 40 dB. It is expected that six channels of such circuits can be implemented on a 5 mm x 5 mm chip. This will allow the analog circuits for observing all components of the electromagnetic field to be realized on a single ASIC chip, which will make it possible to significantly reduce the size of the receiver. In addition to that, the ASIC allows for flexible configurations in the receiver even when six-component circuitry is not required. For example, it enables to assign another analog circuit to waveform and spectrum observation without increasing the circuit area.
In this presentation, we present the detailed design and performance of the current ASIC.