{"action":"created","issue":{"url":"https://api.github.com/repos/sinara-hw/sinara/issues/183","repository_url":"https://api.github.com/repos/sinara-hw/sinara","labels_url":"https://api.github.com/repos/sinara-hw/sinara/issues/183/labels{/name}","comments_url":"https://api.github.com/repos/sinara-hw/sinara/issues/183/comments","events_url":"https://api.github.com/repos/sinara-hw/sinara/issues/183/events","html_url":"https://github.com/sinara-hw/sinara/issues/183","id":223231645,"node_id":"MDU6SXNzdWUyMjMyMzE2NDU=","number":183,"title":"\"Blaster\": future RTM card for sc qubit applications","user":{"login":"dhslichter","id":9222487,"node_id":"MDQ6VXNlcjkyMjI0ODc=","avatar_url":"https://avatars2.githubusercontent.com/u/9222487?v=4","gravatar_id":"","url":"https://api.github.com/users/dhslichter","html_url":"https://github.com/dhslichter","followers_url":"https://api.github.com/users/dhslichter/followers","following_url":"https://api.github.com/users/dhslichter/following{/other_user}","gists_url":"https://api.github.com/users/dhslichter/gists{/gist_id}","starred_url":"https://api.github.com/users/dhslichter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dhslichter/subscriptions","organizations_url":"https://api.github.com/users/dhslichter/orgs","repos_url":"https://api.github.com/users/dhslichter/repos","events_url":"https://api.github.com/users/dhslichter/events{/privacy}","received_events_url":"https://api.github.com/users/dhslichter/received_events","type":"User","site_admin":false},"labels":[{"id":451468917,"node_id":"MDU6TGFiZWw0NTE0Njg5MTc=","url":"https://api.github.com/repos/sinara-hw/sinara/labels/area:hardware","name":"area:hardware","color":"1d76db","default":false},{"id":455744818,"node_id":"MDU6TGFiZWw0NTU3NDQ4MTg=","url":"https://api.github.com/repos/sinara-hw/sinara/labels/prio:0-low","name":"prio:0-low","color":"0e8a16","default":false},{"id":451353728,"node_id":"MDU6TGFiZWw0NTEzNTM3Mjg=","url":"https://api.github.com/repos/sinara-hw/sinara/labels/state:for-contract","name":"state:for-contract","color":"fef2c0","default":false},{"id":470807020,"node_id":"MDU6TGFiZWw0NzA4MDcwMjA=","url":"https://api.github.com/repos/sinara-hw/sinara/labels/type:discussion","name":"type:discussion","color":"f9d0c4","default":false},{"id":449843533,"node_id":"MDU6TGFiZWw0NDk4NDM1MzM=","url":"https://api.github.com/repos/sinara-hw/sinara/labels/type:enhancement","name":"type:enhancement","color":"84b6eb","default":false}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":21,"created_at":"2017-04-20T23:33:23Z","updated_at":"2018-08-17T07:42:17Z","closed_at":"2017-08-21T15:38:57Z","author_association":"MEMBER","body":"Analog Devices has come out with a new set of chips (AD916x) which support output update rates of 12 GSPS, with instantaneous bandwidths of >1 GHz and a variety of interpolation factors.  These are suitable for direct synthesis of signals with frequencies up to ~9 GHz (depending on how much power one needs) using mix mode, same principle as the AD9154.  These capabilities would allow fully digital modulation and direct output of shaped/modulated signals with frequencies and bandwidths relevant for superconducting qubit experiments.  The phase noise performance is somewhat better than that of the AD9154 as well.  This could be a huge boon for scaling sc qubit systems, as it would dramatically reduce the physical size and complexity of the classical control infrastructure (no more external modulators, fewer filters, no more bulky generators, etc).  \r\n\r\nIn the fullness of time, once the existing Sayma AMC/RTM combination is up and running, it would be interesting to approach superconducting qubit researchers about interest in funding design and construction of a microwave-frequency RTM card based on these chips.  One could fit 4 single-channel DACs on a new RTM board (4 lanes each at 10 Gbps gives 1 GHz instantaneous bandwidth, use 6x interpolation, 6 GHz DAC clock, 12 GSPS output update) for use with the existing Sayma AMC.  Resource usage on the AMC FPGA should be similar (~double the data rate per channel but half the number of channels).  One could also add an ADC if desired, e.g. a 500 MSPS 4-channel ADC (e.g. AD9694) for qubit readout signals (this would still require an external demodulation circuit).  \r\n\r\nThis is not an action item for 2017, but it's probably worth starting a discussion with potential users once we have performance details in hand from the Sayma system.  "},"comment":{"url":"https://api.github.com/repos/sinara-hw/sinara/issues/comments/413785045","html_url":"https://github.com/sinara-hw/sinara/issues/183#issuecomment-413785045","issue_url":"https://api.github.com/repos/sinara-hw/sinara/issues/183","id":413785045,"node_id":"MDEyOklzc3VlQ29tbWVudDQxMzc4NTA0NQ==","user":{"login":"gkasprow","id":4325054,"node_id":"MDQ6VXNlcjQzMjUwNTQ=","avatar_url":"https://avatars3.githubusercontent.com/u/4325054?v=4","gravatar_id":"","url":"https://api.github.com/users/gkasprow","html_url":"https://github.com/gkasprow","followers_url":"https://api.github.com/users/gkasprow/followers","following_url":"https://api.github.com/users/gkasprow/following{/other_user}","gists_url":"https://api.github.com/users/gkasprow/gists{/gist_id}","starred_url":"https://api.github.com/users/gkasprow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkasprow/subscriptions","organizations_url":"https://api.github.com/users/gkasprow/orgs","repos_url":"https://api.github.com/users/gkasprow/repos","events_url":"https://api.github.com/users/gkasprow/events{/privacy}","received_events_url":"https://api.github.com/users/gkasprow/received_events","type":"User","site_admin":false},"created_at":"2018-08-17T07:42:17Z","updated_at":"2018-08-17T07:42:17Z","author_association":"COLLABORATOR","body":"I've noticed that. We are building right now SDR radio based on RFSOC for satellite. RFSOC seem to be the only option for sub-us feedback systems i.e. for superconducting qubit readout. This is another project I work on."}}
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