Integrated mixed-signal ASIC with ADC, DAC, and DSP
An integrated analog to digital converting and digital to analog converting (ADDA) RF transceiver for satellite applications, configured to replace conventional analog RF down and up conversion circuitry. The ADDA RF transceiver includes one of more ADCs, DSPs, and DACs, all on a single ASIC. Further, the circuitry is to be radiation tolerant for high availability and reliability in the ionizing radiation environment present in the space environment.
1. A mixed-signal radio frequency (RF) transceiver for a satellite, the RF transceiver being contained on one or more die, all located on a same semiconductor package, the RF transceiver comprising:
a plurality of analog to digital conversion (ADC) units, each configured for conversion of a first RF signal to a sampled digital signal;
a plurality of digital to analog conversion (DAC) units, each configured for conversion of processed digital data to a second RF signal;
a first plurality of digital inputs coupled to one or more reconfigurable digital signal processing (DSP) cores;
a second plurality of digital inputs coupled to the plurality of DAC units;
a first plurality of digital outputs coupled to the one or more reconfigurable DSP cores; and
a second plurality of digital outputs coupled to the plurality of ADC units;
wherein the one or more reconfigurable DSP cores are configured to process data from the second plurality of digital outputs and the one or more reconfigurable DSP cores are configured to output the processed digital data to the second plurality of digital inputs; and
wherein the RF transceiver is configured to selectively cause portions of the RF transceiver to become non-operational, the selectively non-operational portions selected from the group comprising the plurality of ADC units, the plurality of DAC units, the first plurality of digital inputs, the second plurality of digital inputs, the first plurality of digital outputs, the second plurality of digital outputs, and the one or more reconfigurable DSP cores.
2. The RF transceiver of claim 1 , wherein causing the portions of the RF transceiver to become non-operational comprises power islanding or clock gating the non-operational portions.
3. The RF transceiver of claim 1 , wherein one or more of the plurality of DAC units are caused to become non-operational to thereby provide the RF transceiver comprising the plurality of ADC units, the first plurality of digital inputs, the second plurality of digital inputs, the first plurality of digital outputs, the second plurality of digital outputs, and the one or more reconfigurable DSP cores.
4. The RF transceiver of claim 1 , wherein one or more of the plurality of ADC units are caused to become non-operational to thereby provide the RF transceiver comprising the plurality of the DAC units, the first plurality of digital inputs, the second plurality of digital inputs, the first plurality of digital outputs, the second plurality of digital outputs, and the one or more reconfigurable DSP cores.
5. The RF transceiver of claim 1 , wherein the RF transceiver is configured to power off a first ADC unit of the plurality of ADC units while a second ADC unit of the plurality of ADC units is powered on.
6. The RF transceiver of claim 1 , wherein the RF transceiver is configured to power off a first DAC unit of the plurality of DAC units while a second DAC unit of the plurality of DAC units is powered on.
7. The RF transceiver of claim 1 , wherein the plurality of ADC units, the plurality of DAC units, and the one or more reconfigurable DSP cores use a semiconductor process with a feature size in the range of 14 nanometer (nm) to 45 nm.
8. The RF transceiver of claim 1 , wherein the RF transceiver is configured to perform direct upconversion, or downconversion of RF signals up to 30 GHz.
9. The RF transceiver of claim 1 , wherein the one or more reconfigurable DSP cores include features to facilitate beamforming, including equalizer, channelizer, and beamformer features.
10. The RF transceiver of claim 9 , wherein the one or more reconfigurable DSP cores are provided with a plurality of configurations based on a bandwidth and a tune frequency of the first RF signal.
11. The RF transceiver of claim 1 , wherein the RF transceiver is radiation hardened by process or radiation hardened by design.
12. The RF transceiver of claim 11 , wherein the RF transceiver uses a silicon on insulator technology.
13. The RF transceiver of claim 1 , wherein the RF transceiver is configured to cause the plurality of ADC units to become non-operational to thereby provide the RF transceiver comprising the plurality of DAC units, the first plurality of digital inputs, the second plurality of digital inputs, and the one or more reconfigurable DSP cores.
14. The RF transceiver of claim 1 , wherein the RF transceiver is configured to cause the plurality of DAC units to become non-operational to thereby provide the RF transceiver comprising the plurality of ADC units, the first plurality of digital outputs, the second plurality of digital outputs, and the one or more reconfigurable DSP cores.
15. The RF transceiver of claim 1 , wherein:
the plurality of ADC units comprises four ADC units; and
the plurality of DAC units comprises four DAC units;
wherein in a first mode two ADC units and two DAC units are selectively caused to become non-operational; and
wherein in a second mode three ADC units and three DAC units are selectively caused to become non-operational.
16. The RF transceiver of claim 1 , wherein the RF transceiver is configured to operate a first ADC unit of the plurality of ADC units in a low power mode while a second ADC unit of the plurality of ADC units is powered on.
17. The RF transceiver of claim 1 , wherein the RF transceiver is configured to operate a first DAC unit of the plurality of DAC units in a low power mode while a second DAC unit of the plurality of DAC units is powered on.
18. A method for operating a mixed-signal radio frequency (RF) transceiver for a satellite, the RF transceiver being contained on one or more die, all located on a same semiconductor package, wherein:
the RF transceiver comprises:
one or more analog to digital conversion (ADC) units;
one or more digital to analog conversion (DAC) units;
a first plurality of digital inputs coupled to one or more reconfigurable digital signal processing (DSP) cores;
a second plurality of digital inputs coupled to the plurality of DAC units;
a first plurality of digital outputs coupled to the one or more reconfigurable DSP cores; and
a second plurality of digital outputs coupled to the plurality of ADC units;
the method comprising:
selectively causing portions of the RF transceiver to become non-operational, the selectively non-operational portions selected from the group comprising the one or more ADC units, the one or more DAC units, the first plurality of digital inputs, the second plurality of digital inputs, the first plurality of digital outputs, the second plurality of digital outputs, and the one or more reconfigurable DSP cores;
in response to causing an ADC unit of the one or more ADC units to be operational, converting, by an operating ADC unit of the one or more ADC units, a first RF signal to a sampled digital signal;
in response to causing a DAC unit of the one or more DAC units to be operational, converting, by an operating DAC unit of the one or more DAC units, processed digital data to a second RF signal; and
in response to causing a reconfigurable DSP core of the one or more reconfigurable DSP cores to be operational:
processing, by an operating reconfigurable DSP core of the one or more reconfigurable DSP cores, data from the second plurality of digital outputs; and
outputting, by an operating reconfigurable DSP core of the one or more reconfigurable DSP cores, the processed digital data to the second plurality of digital inputs.
19. The method for operating the mixed-signal radio RF transceiver of claim 18 , wherein selectively causing the portions of the RF transceiver to become non-operational comprises power islanding or clock gating the non-operational portions.
20. The method for operating the mixed-signal radio RF transceiver of claim 18 , wherein:
the one or more ADC units comprise four ADC units;
the one or more DAC units comprise four DAC units; and
the method further comprising:
in a first mode, selectively causing two ADC units and two DAC units to become non-operational; and
in a second mode, selectively causing three ADC units and three DAC units to become non-operational.