公开(公告)号：US11502716B2

公开(公告)日：2022-11-15

申请号：US17123915

申请日：2020-12-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Viswanathan Venkatesh Kumar ,  Deep Banerjee ,  Shishir Goyal ,  Sreeram Nasum Subramanyam

IPC: H04B1/40 ,  H04B3/56 ,  H04B3/54 ,  H03K5/24

Abstract: An on-off keying (OOK) receiver circuit includes a band-pass filter and an envelope detector. The band-pass filter includes a high-pass filter, a low-pass filter, and a switch. The high-pass filter is configured to filter an OOK input signal. The low-pass filter is configured to filter an output signal of the high-pass filter. The switch is coupled to an output of the high-pass filter, and is configured to, with each cycle of the OOK input signal, dissipate energy stored in the band-pass filter. The envelope detector is configured to receive a filtered OOK input signal from the band-pass filter, and to generate an OOK output signal based on the filtered OOK input signal.

公开(公告)号：US11870246B2

公开(公告)日：2024-01-09

申请号：US16411251

申请日：2019-05-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Shishir Goyal ,  Lokesh Kumar Gupta

IPC: H02H9/04 ,  G01R19/10 ,  H02H1/00 ,  G01R19/165 ,  H03K17/082

CPC classification number: H02H9/045 ,  G01R19/10 ,  G01R19/16571 ,  H02H1/0007 ,  H03K17/0822 ,  H03K17/0826

Abstract: A positive overshoot detection circuit comprises a transistor coupled to a current mirror, a reference current source coupled to the current mirror, and a comparator coupled to the reference current source and the current mirror. The comparator output indicates whether the current mirror's current is greater than the reference current source's current. A control input and a current terminal of the transistor are coupled to a clamping circuit. A negative overshoot detection circuit comprises a biasing sub-circuit coupled to a transistor, a resistor coupled to the transistor, and a comparator coupled to the transistor and the resistor. The comparator output indicates whether the transistor is in an on or off state. The biasing sub-circuit is coupled to a clamping circuit. In some implementations, the comparator outputs from the positive and negative overshoot detection circuits are provided to a driver circuit, which modifies its operation.

公开(公告)号：US11967816B2

公开(公告)日：2024-04-23

申请号：US17244692

申请日：2021-04-29

Applicant: Texas Instruments Incorporated

Inventor： Ishaan Kubba ,  Sreeram Nasum Subramanyam ,  Shishir Goyal ,  Deep Banerjee

IPC: H02H3/00 ,  H03K5/01 ,  H03K5/24

CPC classification number: H02H3/003 ,  H03K5/01 ,  H03K5/24

Abstract: An input/output (I/O) interface includes a resistance-to-current (R/I) converter; an internal resistor; first, second, and third current sources; first and second diodes; and a comparator. The R/I converter is coupled to an I/O pin and generates an output current based on an external resistance at the I/O pin during an analog operating mode. The internal resistor is coupled to the I/O pin and to ground. The first current source is coupled to the R/I converter circuit. The first diode is coupled to the R/I converter and to the I/O pin. The second current source is coupled to the R/I converter and the first diode and to ground. The second diode is coupled to the I/O pin and to the third current source. The comparator has inputs coupled to the I/O pin and to a reference voltage, and outputs a control signal indicative of a digital operating mode.