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US 10,656,222 B2Granted
Variable gain amplification for linearization of NMR signals
AssigneeWaveguide Corporation
InventorSebastian Patulea
Life of this patent
Estimating the term…
Abstract
Various approaches of amplifying an NMR signal in response to a transmitted NMR pulse include estimating the characteristic time associated with the NMR signal; transmitting the NMR pulse to the sample and receiving the NMR signal therefrom; and applying a time-dependent amplifier gain to the received NMR signal based at least in part on the estimated characteristic time.
Claims22
A method of amplifying an NMR signal in response to a transmitted NMR pulse, the method comprising:
- estimating a characteristic time associated with the NMR signal;
- transmitting the NMR pulse to a sample and receiving the NMR signal therefrom;
- applying a time-dependent amplifier gain to the received NMR signal based at least in part on the estimated characteristic time;
- and
- computing a second characteristic time associated with the amplified NMR signal by applying an inverse gain function to the amplified NMR signal.
2 more elements
A method of amplifying an NMR signal in response to a transmitted NMR pulse, the method comprising:
- estimating a characteristic time associated with the NMR signal;
- transmitting the NMR pulse to a sample and receiving the NMR signal therefrom;
- and
- applying a time-dependent amplifier gain to the received NMR signal based at least in part on the estimated characteristic time,
- wherein the time-dependent amplifier gain comprises an exponential gain profile.
2 more elements
A method of amplifying an NMR signal in response to a transmitted NMR pulse, the method comprising:
- estimating a characteristic time associated with the NMR signal;
- transmitting the NMR pulse to a sample and receiving the NMR signal therefrom;
- and
- applying a time-dependent amplifier gain to the received NMR signal based at least in part on the estimated characteristic time,
- wherein the time-dependent amplifier gain comprises a series of discrete gain increases and a profile of the series of discrete gain increases comprises an exponent.
2 more elements
An NMR apparatus comprising:
- a transceiver for transmitting an NMR pulse to a sample and receiving an NMR signal therefrom;
- and
- a controller configured to:
- (i) estimate a characteristic time associated with the NMR signal;
- (ii) cause the transceiver to transmit the NMR pulse to the sample and receive the NMR signal therefrom;
- (iii) cause a time-dependent amplifier gain to be applied to the received NMR signal based at least in part on the estimated characteristic time;
- and
- (iv) compute a second characteristic time associated with the amplified NMR signal by computationally applying an inverse gain function to the amplified NMR signal.
5 more elements
An NMR apparatus, comprising:
- a transceiver for transmitting an NMR pulse to a sample and receiving an NMR signal therefrom;
- a controller configured to:
- (i) estimate a characteristic time associated with the NMR signal;
- (ii) cause the transceiver to transmit the NMR pulse to the sample and receive the NMR signal therefrom;
- and
- (iii) cause a time-dependent amplifier gain to be applied to the received NMR signal based at least in part on the estimated characteristic time;
- a variable-gain amplifier for applying the time-dependent amplifier gain to the received NMR signal;
- and
- a pulse-sequence generator having a gain setting associated with gains generated by the variable-gain amplifier,
- wherein the pulse-sequence generator generates a plurality of NMR pulses, wherein an amplitude difference between adjacent pulses is determined based at least in part on a step size of the gains generated by the variable-gain amplifier.
7 more elements
An NMR apparatus comprising:
- a transceiver for transmitting an NMR pulse to a sample and receiving an NMR signal therefrom;
- and
- a controller configured to:
- (i) estimate a characteristic time associated with the NMR signal;
- (ii) cause the transceiver to transmit the NMR pulse to the sample and receive the NMR signal therefrom;
- and
- (iii) cause a time-dependent amplifier gain to be applied to the received NMR signal based at least in part on the estimated characteristic time;
- wherein the time-dependent amplifier gain comprises an exponential gain profile.
5 more elements
An NMR apparatus comprising:
- a transceiver for transmitting an NMR pulse to a sample and receiving an NMR signal therefrom;
- and
- a controller configured to:
- (i) estimate a characteristic time associated with the NMR signal;
- (ii) cause the transceiver to transmit the NMR pulse to the sample and receive the NMR signal therefrom;
- and
- (iii) cause a time-dependent amplifier gain to be applied to the received NMR signal based at least in part on the estimated characteristic time,
- wherein the time-dependent amplifier gain comprises a series of discrete gain increases and a profile of the series of discrete gain increases comprises an exponent.
5 more elements
A method of dynamically varying gain amplification of received NMR signals in response to transmitted NMR pulses, each received NMR signal corresponding to a transmitted NMR pulse, the method comprising:
- (i) transmitting a first one of the NMR pulses to a sample and receiving therefrom a first one of the NMR signals;
- (ii) determining a characteristic time associated with the first one of the NMR signals;
- (iii) transmitting a second one of the NMR pulses to the sample and receiving therefrom a second one of the NMR signals;
- and
- (iv) applying a time-dependent amplifier gain to the received second one of the NMR signals based at least in part on the determined characteristic time,
- wherein the time-dependent amplifier gain comprises an exponential gain profile.
3 more elements
An NMR apparatus comprising:
- a transceiver for transmitting NMR pulses to a sample and receiving NMR signals therefrom, each NMR signal corresponding to a transmitted NMR pulse;
- and
- a controller configured to:
- (i) cause the transceiver to transmit a first one of the NMR pulses to the sample and receive therefrom the first one of the NMR signals;
- (ii) determine a characteristic time associated with the first one of the NMR signals;
- (iii) cause the transceiver to transmit a second one of the NMR pulses to the sample and receive therefrom the second one of the NMR signals;
- and
- (iv) cause the transceiver to apply a time-dependent amplifier gain to the received second one of the NMR signals based at least in part on the determined characteristic time,
- wherein the time-dependent amplifier gain comprises an exponential gain profile.
6 more elements
Dependencies are inferred from the claim text.