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公开(公告)号：US09602123B2
公开(公告)日：2017-03-21
申请号：US15107568
申请日：2014-12-03
CPC分类号： H03M1/1245 , H03M1/0624 , H03M1/1009 , H03M1/1265 , H03M1/38 , H03M1/46
摘要： A cognitive signal converter adapted to produce a digital output signal based on an analog input signal comprises an analog-to-digital converter (ADC) and a cognitive network. The ADC is adapted to produce a digital converted signal based on the analog input signal, a sample clock signal and a process clock signal by sampling the analog input signal in accordance with the sample clock signal and quantizing each analog input signal sample based on the process clock signal. The cognitive network is adapted to receive the digital converted signal of the ADC, control at least one of the sample clock signal and the process clock signal based on the received digital converted signal and one or more characteristics of the analog signal source, and produce the digital output signal based on the received digital converted signal. Corresponding integrated circuit, electronic device and method are also disclosed.
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2.发明授权公开(公告)号：US11307635B2
公开(公告)日：2022-04-19
申请号：US16609573
申请日：2018-04-24
申请人： FINGERPRINT CARDS AB
IPC分类号： G06F1/32 , G06F1/3234 , G06F1/10 , G06F1/26 , G06F1/3206 , G06F11/30 , G06F21/32 , G06F21/60 , G06F21/62 , G06K9/00 , G06K19/07 , H04B5/00
摘要： A method of controlling operation of a field-powered biometric device comprising biometric acquisition circuitry, processing circuitry controllable to transition between a first functional state having a first power consumption and a second functional state having a second power consumption lower than the first power consumption, and power management circuitry. The method comprises the steps of monitoring, by the power management circuitry, a property indicative of a supply voltage to the processing circuitry; controlling, when the monitored property indicates that the supply voltage has fallen to a first threshold voltage, the processing circuitry to transition from the first functional state to the second functional state; and controlling, when the monitored property indicates that the supply voltage has increased to a second threshold voltage higher than the first threshold voltage, the processing circuitry to transition from the second functional state to the first functional state.
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公开(公告)号：US09977945B2
公开(公告)日：2018-05-22
申请号：US15464680
申请日：2017-03-21
申请人： Fingerprint Cards AB
CPC分类号： G06K9/0002 , G06F3/0412 , G06F2203/0338 , G06F2203/04103 , G06K9/00087
摘要： There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, said capacitive fingerprint sensing device comprising: a protective top layer to be touched by said finger; a first metal layer comprising a two-dimensional array of sensing structures arranged underneath said top layer; a second metal layer, arranged underneath said first metal layer, comprising a plurality of conductive structures a dielectric layer arranged between the first and second metal layers to electrically insulate the first metal layer from the second metal layer, the dielectric layer comprising a low-k material; and readout circuitry arranged underneath said second metal layer and coupled to each of the electrically conductive sensing structures by means of via connections to receive a sensing signal indicative of a distance between said finger and said sensing structure. There is also provided a method for manufacturing such a device.
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公开(公告)号：US09953204B2
公开(公告)日：2018-04-24
申请号：US15399124
申请日：2017-01-05
申请人： Fingerprint Cards AB
发明人： Rolf Sundblad , Emil Hjalmarson , Erik Säll , Allan Olsson , Klaas-Jan De Langen
CPC分类号： G06K9/0002 , G06K9/00087 , G06K9/03 , H02M3/07
摘要： A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.
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公开(公告)号：US20170351895A1
公开(公告)日：2017-12-07
申请号：US15464680
申请日：2017-03-21
申请人： Fingerprint Cards AB
IPC分类号： G06K9/00
CPC分类号： G06K9/0002 , G06F3/0412 , G06F2203/0338 , G06F2203/04103 , G06K9/00087
摘要： There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, said capacitive fingerprint sensing device comprising: a protective top layer to be touched by said finger; a first metal layer comprising a two-dimensional array of sensing structures arranged underneath said top layer; a second metal layer, arranged underneath said first metal layer, comprising a plurality of conductive structures a dielectric layer arranged between the first and second metal layers to electrically insulate the first metal layer from the second metal layer, the dielectric layer comprising a low-k material; and readout circuitry arranged underneath said second metal layer and coupled to each of the electrically conductive sensing structures by means of via connections to receive a sensing signal indicative of a distance between said finger and said sensing structure. There is also provided a method for manufacturing such a device.
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公开(公告)号：US20170308730A1
公开(公告)日：2017-10-26
申请号：US15399124
申请日：2017-01-05
申请人： Fingerprint Cards AB
发明人： Rolf Sundblad , Emil Hjalmarson , Erik Säll , Allan Olsson , Klaas-Jan De Langen
CPC分类号： G06K9/0002 , G06K9/00087 , G06K9/03 , H02M3/07
摘要： A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.
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