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公开(公告)号:US20230179244A1
公开(公告)日:2023-06-08
申请号:US17457496
申请日:2021-12-03
Applicant: STMicroelectronics S.r.l.
Inventor: Nunzio Spina , Giuseppe Palmisano , Alessandro Castorina
CPC classification number: H04B1/16 , H03F3/19 , H04L27/06 , H03F2200/451
Abstract: A method for calibrating the DC operating point of a PWM receiver circuit is disclosed. The PWM receiving circuit includes an envelop detector having a first resistor string, and includes a bias circuit having a second resistor string and a plurality of switches. The second resistor string is coupled between a supply voltage and a reference voltage and functions as a voltage divider. Each switch, when closed, accesses a second voltage at a node of the second resistor string connected to the closed switch. To perform the calibration process, the plurality of switches is closed one at a time, and the second voltage is compared with a first voltage at a first node of the first resistor string. The switch that, when closed, produces the smallest difference between the first voltage and the second voltage remains closed after the calibration process, and is used for demodulating the PWM signal.
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公开(公告)号:US12081253B2
公开(公告)日:2024-09-03
申请号:US18352424
申请日:2023-07-14
Applicant: STMicroelectronics S.r.l.
Inventor: Nunzio Spina , Giuseppe Palmisano , Alessandro Castorina
CPC classification number: H04B1/16 , H03F3/19 , H03F3/245 , H04L27/06 , H03F2200/451
Abstract: A method for calibrating the DC operating point of a PWM receiver circuit is disclosed. The PWM receiving circuit includes an envelope detector having a first resistor string, and includes a bias circuit having a second resistor string and a plurality of switches. The second resistor string is coupled between a supply voltage and a reference voltage and functions as a voltage divider. Each switch, when closed, accesses a second voltage at a node of the second resistor string connected to the closed switch. To perform the calibration process, the plurality of switches is closed one at a time, and the second voltage is compared with a first voltage at a first node of the first resistor string. The switch that, when closed, produces the smallest difference between the first voltage and the second voltage remains closed after the calibration process, and is used for demodulating the PWM signal.
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公开(公告)号:US11750234B2
公开(公告)日:2023-09-05
申请号:US17457496
申请日:2021-12-03
Applicant: STMicroelectronics S.r.l.
Inventor: Nunzio Spina , Giuseppe Palmisano , Alessandro Castorina
CPC classification number: H04B1/16 , H03F3/19 , H03F3/245 , H04L27/06 , H03F2200/451
Abstract: A method for calibrating the DC operating point of a PWM receiver circuit is disclosed. The PWM receiving circuit includes an envelop detector having a first resistor string, and includes a bias circuit having a second resistor string and a plurality of switches. The second resistor string is coupled between a supply voltage and a reference voltage and functions as a voltage divider. Each switch, when closed, accesses a second voltage at a node of the second resistor string connected to the closed switch. To perform the calibration process, the plurality of switches is closed one at a time, and the second voltage is compared with a first voltage at a first node of the first resistor string. The switch that, when closed, produces the smallest difference between the first voltage and the second voltage remains closed after the calibration process, and is used for demodulating the PWM signal.
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公开(公告)号:US20230361796A1
公开(公告)日:2023-11-09
申请号:US18352424
申请日:2023-07-14
Applicant: STMicroelectronics S.r.l.
Inventor: Nunzio Spina , Giuseppe Palmisano , Alessandro Castorina
CPC classification number: H04B1/16 , H04L27/06 , H03F3/19 , H03F3/245 , H03F2200/451
Abstract: A method for calibrating the DC operating point of a PWM receiver circuit is disclosed. The PWM receiving circuit includes an envelope detector having a first resistor string, and includes a bias circuit having a second resistor string and a plurality of switches. The second resistor string is coupled between a supply voltage and a reference voltage and functions as a voltage divider. Each switch, when closed, accesses a second voltage at a node of the second resistor string connected to the closed switch. To perform the calibration process, the plurality of switches is closed one at a time, and the second voltage is compared with a first voltage at a first node of the first resistor string. The switch that, when closed, produces the smallest difference between the first voltage and the second voltage remains closed after the calibration process, and is used for demodulating the PWM signal.