HBridgedCurrentSource¶

Class Arguments

Argument	Type	Default Value
current_source	CurrentSource
switch_fwd	Switchable
switch_rev	Switchable
min_current	TFloat	-inf
max_current	TFloat	inf
default_ramp_steps	TInt32	30

Bold arguments are mandatory. For more documentation on the listed arguments refer to the class definition below. If parameters appear in this list but not in the class definition below, please recursively check the linked base classes for the definition of the parameter.

Inheritance Diagram

Example Component Dictionary

   {
    "currentsource_example": {
        "classname": "atomiq.components.electronics.currentsource.HBridgedCurrentSource",
        "arguments": {
            "current_source": "<mandatory parameter (CurrentSource)>",
            "switch_fwd": "<mandatory parameter (Switchable)>",
            "switch_rev": "<mandatory parameter (Switchable)>",
            "min_current": -1e999,
            "max_current": 1e999,
            "default_ramp_steps": 30
        }
    }
}

Class Description

class atomiq.components.electronics.currentsource.HBridgedCurrentSource(current_source, switch_fwd, switch_rev, *args, **kwargs)

Bases: CurrentSource, Switchable

Combination of an H-bridge and a current source

Combining an H-bridge with a unipolar current source allows to create a bipolar current source. This class bundles these two comoponents an exposes them as a bipolar current source.

This class uses two switches to control the state of the H-bridge, switch_fwd and switch_rev. It assumes that your H-brigde does the following depending on their state:

H-Bridge States¶
`switch_fwd`	`switch_rev`	Current Flow
False	False	Off
True	False	Forward
False	True	Reverse
True	True	Invalid

Parameters:

current_source (CurrentSource) -- The current source connected to the H-bridge
switch_fwd (Switchable) -- Switch to enable current flow in the forward direction
switch_rev (Switchable) -- Switch to enable current flow in the reverse direction

A Parametrizable is an entity that can be controlled by one or more continuous parameter(s)

ramp_current(duration, current_start, current_end, ramp_timestep=-1.0, ramp_steps=-1)

Ramp current over a given duration.

This method advances the timeline by duration

Parameters:

duration (artiq.compiler.types.TMono('float', OrderedDict())) -- ramp duration [s]
current_start (artiq.compiler.types.TMono('float', OrderedDict())) -- initial current [V]
current_end (artiq.compiler.types.TMono('float', OrderedDict())) -- end current [V]
ramp_timestep (artiq.compiler.types.TMono('float', OrderedDict()))
ramp_steps (artiq.compiler.types.TMono('int', OrderedDict([('width', artiq.compiler.types.TValue(32))])))

set_current(current)

Set the current delivered by the current source

Parameters:: current (artiq.compiler.types.TMono('float', OrderedDict())) -- Current in A