Abstract: A phase shifting system, a chip, and a radar sensor are provided. A respective transmission line phase-shifting unit is configured to receive at least one phase shifting control signal and to shift a phase of a RF signal by a first phase or a second phase. Each transmission line phase-shifting unit includes a first group of transmission lines and a second group of transmission lines. At least some transmission lines in the first group of transmission lines of each transmission line phase-shifting unit are physically isolated from at least some transmission lines in the first group of transmission lines of an adjacent transmission line phase-shifting unit and transmission lines of the second group of transmission lines of each transmission line phase-shifting unit are coupled to respective transmission lines of the second group of transmission lines of an adjacent transmission line phase-shifting unit.

Abstract: A transmission line phase shifter, a system, a chip, and a radar sensor are provided. The transmission line phase shifter includes at least one transmission line phase-shifting unit. A respective transmission line phase-shifting unit includes a first pair of differential transmission lines, a second pair of differential transmission lines, and a phase adjusting circuit. The phase adjusting circuit is configured to adjust electrical parameters of a transmission path where at least one pair of transmission lines of the first pair of differential transmission lines and the second pair of differential transmission lines is located according to at least one phase shifting control signal received, so as to enable that a RF signal output from the respective transmission line phase-shifting unit has a phase shift of a first phase or a second phase relative to an input RF signal of the respective transmission line phase-shifting unit.

Abstract: A transmission line phase shifter, a chip, and a radar sensor are provided. The transmission line phase shifter includes at least one transmission line phase-shifting unit. At a calibration stage, a preset number of transmission line phase-shifting units are configured to be in a state of a first phase or in a state of a second phase and configured to output an output RF signal, such that phase calibration information of each transmission line phase-shifting unit is determinable. At an operation stage, the phase adjusting circuit of the respective transmission line phase-shifting unit is configured to receive a corresponding phase shifting control signal and to adjust the respective transmission line phase-shifting unit, to enable the respective transmission line phase-shifting unit to shift a phase of an input RF signal by a calibrated first phase or a calibrated second phase.

Abstract: A radio frequency (RF) inverter, a transmission line phase shifter, a system, a chip, and a radar sensor are provided. The RF inverter includes an inductance circuit and a first phase adjusting circuit that both are arranged symmetrically along a same symmetry axis. The inductance circuit includes a single-ended signal interface and a differential signal interface. The first phase adjusting circuit includes two controlled switches, and each controlled switch is connected between the ground wire and a corresponding ground terminal of a pair of ground terminals in the single-ended signal interface, to enable the inductance circuit to perform in-phase or inverting phase shifting on a received RF signal.

Abstract: A method for judging capacitance type touch buttons in touch sensing technical field includes that: when touching a button, determining the change trend of the charge quantity on the button; a charge regulation is performed to the charge accumulation area corresponding to each button, until the charge quantity in the charge accumulation area corresponding to the button remains unchanged; calculating the charge changing quantity of the charge accumulation area when touching the button, and calculating the ratio between the charge changing quantity of the charge accumulation area and the charge balance quantity as well; and when the change trend of the charge quantity on the button is decrease and the ratio between the charge changing quantity of the charge accumulation area corresponding to the button and the charge balance quantity is larger than or equal to the first threshold value and smaller than the third threshold value, or when the change trend of the charge quantity on the button is increase and the r

Abstract: A touch recognition method, a touch key structure and a touch device are provided. The touch recognition method includes when the touch key structure is faced to touching or near touching, supplementing charges to a charge accumulation area corresponding to each key in the touch key structure until the charge amount in the charge accumulation area corresponding to each key reaches a balance; calculating the charge variation amount in each charge accumulation area when the touch key structure is faced to touching according to the charge supplement amount in the charge accumulation area corresponding to each key, and calculating the ratio of the charge variation amount to the charge balance amount in each charge accumulation area; recognizing the key corresponding to the charge accumulation area which has the largest charge variation amount and the largest ratio of the charge variation amount to the charge balance amount as the touched key.

Abstract: A touch recognition method, a touch key structure and a touch device are provided. The touch recognition method includes when the touch key structure is faced to touching or near touching, supplementing charges to a charge accumulation area corresponding to each key in the touch key structure until the charge amount in the charge accumulation area corresponding to each key reaches a balance; calculating the charge variation amount in each charge accumulation area when the touch key structure is faced to touching according to the charge supplement amount in the charge accumulation area corresponding to each key, and calculating the ratio of the charge variation amount to the charge balance amount in each charge accumulation area; recognizing the key corresponding to the charge accumulation area which has the largest charge variation amount and the largest ratio of the charge variation amount to the charge balance amount as the touched key.

Abstract: A method for judging capacitance type touch buttons in touch sensing technical field includes that: when touching a button, determining the change trend of the charge quantity on the button; a charge regulation is performed to the charge accumulation area corresponding to each button, until the charge quantity in the charge accumulation area corresponding to the button remains unchanged; calculating the charge changing quantity of the charge accumulation area when touching the button, and calculating the ratio between the charge changing quantity of the charge accumulation area and the charge balance quantity as well; and when the change trend of the charge quantity on the button is decrease and the ratio between the charge changing quantity of the charge accumulation area corresponding to the button and the charge balance quantity is larger than or equal to the first threshold value and smaller than the third threshold value, or when the change trend of the charge quantity on the button is increase and the r