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US 11,768,282 B2Granted
Multilevel bipolar pulser
AssigneeBfly Operations, Inc.
InventorsKailiang Chen, Tyler S. Ralston, Keith G. Fife
Life of this patent
Estimating the term…
Abstract
Circuitry for ultrasound devices is described. A multilevel pulser is described, which can provide bipolar pulses of multiple levels. The multilevel pulser includes a pulsing circuit and pulser and feedback circuit. Symmetric switches are also described. The symmetric switches can be positioned as inputs to ultrasound receiving circuitry to block signals from the receiving circuitry.
Claims20
An apparatus, comprising:
- a plurality of ultrasonic transducers configured to transmit ultrasound signals and receive reflections of the ultrasound signals;
- a complementary metal oxide semiconductor (CMOS) die having the plurality of ultrasonic transducers and an integrated circuit formed thereon, wherein:
- the integrated circuit comprises a plurality of multi-level pulsers and a plurality of feedback circuits;
- each feedback circuit of the plurality of feedback circuits is configured to provide a respective control signal of a plurality of control signals to a respective multi-level pulser of the plurality of multi-level pulsers to control the respective multi-level pulser to generate a respective input signal of a plurality of input signals, the respective input signal comprising at least three voltage levels;
- and
- each multi-level pulser of the plurality of multi-level pulsers is configured to provide the respective input signal to a respective ultrasonic transducer of the plurality of ultrasonic transducers.
3 more elements
An ultrasound device comprising:
- at least one ultrasonic transducer;
- a pulser having an input terminal and an output terminal coupled to the ultrasonic transducer and configured to provide an input signal to the ultrasonic transducer having a value selected from among multiple selectable values;
- a feedback circuit coupled to the output terminal and the input terminal of the pulser and configured to provide a control signal to the input terminal of the pulser based on a comparison of a detection signal, representing or derived from the input signal, to a first threshold voltage of a plurality of comparison threshold voltages generated by the feedback circuit;
- and
- a dividing circuit configured to provide the detection signal to the feedback circuit, wherein a voltage of the detection signal is proportional to a voltage of the input signal.
2 more elements
Dependencies are inferred from the claim text.