公开(公告)号：US12021492B2

公开(公告)日：2024-06-25

申请号：US17303292

申请日：2021-05-26

申请人： InPlay, Inc.

发明人： Ruifeng Liu ,  Russell Mohn

IPC分类号： H03F3/217 ,  H03F1/56 ,  H03F3/193 ,  H03F3/24

CPC分类号： H03F3/245 ,  H03F1/565 ,  H03F3/193 ,  H03F3/2171 ,  H03F2200/171 ,  H03F2200/451

摘要： A class-D RF power amplifier (PA) architecture with duty cycle control has improved power efficiency while suppressing even-order harmonics. An inductor and capacitor (LC) low pass filter (LPF) can also be integrated on-chip to further suppress harmonics and provide impedance transformation between the PA and load. This eases the design for customers and reduce their bill of materials cost. The LPF can also match the PA to the load impedance to improve efficiency. The harmonic levels can also be controlled by adjusting the duty cycle of the PA output.

公开(公告)号：US11743702B1

公开(公告)日：2023-08-29

申请号：US17822914

申请日：2022-08-29

申请人： InPlay, Inc.

发明人： Qun Wu ,  Yongru Gu ,  Jun Tang ,  Russell Mohn

IPC分类号： H04W4/80

CPC分类号： H04W4/80

摘要： An advertising method for a low-power Bluetooth® device includes driving a finite state machine to obtain a pre-generated or external microcontroller input advertising packet definition; reading in the finite state machine the advertising content and the advertising channel in the advertising packet definition; driving the finite state machine to play the advertising content in the advertising channel. Using the finite state machine, that is, being able to play the advertising content in the advertising packet definition eliminates the need for complicated software development work of the Bluetooth® chip, enabling the Bluetooth® chip to advertising without software development, thus reducing the development cost of the Bluetooth® system, promoting the further wider adoption of low-power Bluetooth® technology, and promoting the development of the Internet of Things.

公开(公告)号：US11463049B1

公开(公告)日：2022-10-04

申请号：US17303293

申请日：2021-05-26

申请人： InPlay, Inc.

发明人： Ruifeng Liu ,  Russell Mohn

IPC分类号： H03F1/52 ,  H03F1/02 ,  H03F3/21

摘要： A digitally modulated polar power amplifier uses a thin-oxide amplifying transistor with a protection diode. The polar power includes a driver amplifier in a driver stage that can receive a phase-modulated signal with a constant envelope and amplify the signal for the output stage, which includes only a single thin-oxide transistor, leading to improved efficiency over systems that require a thick-oxide transistor. A protection diode can be added between the output of the polar power amplifier and the supply voltage to limit the output to the sum of the supply voltage plus the forward voltage of the diode. Amplitude modulation can be achieved through dynamically turning on and off the digital power amplifier via an amplitude control word (acw) input signal.

公开(公告)号：US11309932B1

公开(公告)日：2022-04-19

申请号：US17303265

申请日：2021-05-25

申请人： InPlay, Inc.

发明人： Ruifeng Liu ,  Russell Mohn

IPC分类号： H04B1/405 ,  H04B1/3805 ,  H04B1/04

摘要： Semiconductor chips are made increasingly smaller, thanks to improved design techniques and process scaling. Sometimes the bottleneck is not the chip itself but the package size due to many necessary pins. To help reduce the number of package pins, the chip should use less pins by sharing or reusing pins if possible. Therefore, single-ended RF input/output is used for transceiver, and the same pin is shared between RX and TX. A receiver (RX)-transmitter (TX) impedance co-matching method uses multiple bondwires for transceivers sharing one input/output (I/O) pin between RX and TX. The RX input impedance and TX output impedance are transformed closer to each other or even to the same impedance, which makes it possible to get the best RX and TX performance with just one matching network. The chip area is also saved without using on-chip inductors.