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US 10,094,917 B2Granted
Symmetric receiver switch for bipolar pulser
AssigneeButterfly Network, Inc.
InventorsKailiang Chen, Tyler S. Ralston, Keith G. Fife
Life of this patent
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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.
Claims11
An apparatus, comprising:
- a metal oxide semiconductor (MOS) die having ultrasonic transducers and an integrated circuitry formed thereon, the integrated circuit including an array of symmetric switches coupled to an array of ultrasonic transducers,
- wherein a first symmetric receiver switch of the array of symmetric receiver switches comprises a first transistor and a second transistor, the first symmetric receiver switch having an input terminal coupled between the output terminal of a bipolar pulser and an ultrasonic transducer;
- wherein the first transistor has a first gate, a first source and a first drain and the second transistor has a second gate, a second source and a second drain, and wherein the first gate is connected to the second gate and the first source is connected to the second source, and wherein the first gate and the first source are coupled or couplable to a first same electric potential at a first time, and to a second same electric potential at a second time.
An ultrasound device, comprising:
- an ultrasonic transducer;
- a receiving circuit configured to process an electrical signal output by the ultrasonic transducer, wherein the receiving circuit comprises a current-to-voltage converter;
- and
- a symmetric switch having an input terminal coupled between the ultrasonic transducer and the receiving circuit.
1 more element
Dependencies are inferred from the claim text.