摘要:
Exemplary embodiments disclosed are directed to power and impedance measurement circuits that may be used to measure power and/or impedance are described. A measurement circuit may include a sensor and a computation unit. The sensor may sense (i) a first voltage signal across a series circuit coupled to a load to obtain a first sensed signal and (ii) a second voltage signal at a designated end of the series circuit to obtain a second sensed signal. The sensor may mix (i) a first version of the first sensed signal with a first version of the second sensed signal to obtain a first sensor output and (ii) a second version of the first sensed signal with a second version of the second sensed signal to obtain a second sensor output. The computation unit may determine the impedance and/or delivered power at the designated end of the series circuit based on the sensor outputs.
摘要:
Exemplary embodiments disclosed are directed to power and impedance measurement circuits that may be used to measure power and/or impedance are described. A measurement circuit may include a sensor and a computation unit. The sensor may sense (i) a first voltage signal across a series circuit coupled to a load to obtain a first sensed signal and (ii) a second voltage signal at a designated end of the series circuit to obtain a second sensed signal. The sensor may mix (i) a first version of the first sensed signal with a first version of the second sensed signal to obtain a first sensor output and (ii) a second version of the first sensed signal with a second version of the second sensed signal to obtain a second sensor output. The computation unit may determine the impedance and/or delivered power at the designated end of the series circuit based on the sensor outputs.
摘要:
In one embodiment of the invention, a method for convolution of signals is disclosed including generating four phased half duty cycle clocks each being out of phase by a multiple of ninety degrees from the others; coupling the four phased half duty cycle clocks into a four phase half duty cycle mixer; and switching switches in the four phase half duty cycle mixer in response to the four phased half duty cycle clocks to convolve a differential input signal with the four phased half duty cycle clocks to concurrently generate a differential in-phase output signal and a differential quadrature-phase output signal on a dual differential output port.
摘要:
During an ESD event, an ESD current flows from a ground node of a first ESD protection circuit and out of an integrated circuit to a terminal of a package that houses the integrated circuit. To improve ESD performance, a second ESD protection circuit is provided. A diode of the second ESD protection circuit is coupled between the ground node and the body of an input transistor of a Low Noise Amplifier (LNA). If the voltage on the ground node changes quickly during an ESD event (for example, due to a current spike flowing across a wire bond), then the diode charges the body of the transistor, thereby preventing a large gate-to-body voltage from developing across transistor. In some embodiments, another ground bond pad is provided and the second ESD protection circuit includes other diodes that charge or discharge other nodes during the ESD event to prevent transistor damage.
摘要:
In one embodiment of the invention, a method for convolution of signals is disclosed including generating four phased half duty cycle clocks each being out of phase by a multiple of ninety degrees from the others; coupling the four phased half duty cycle clocks into a four phase half duty cycle mixer; and switching switches in the four phase half duty cycle mixer in response to the four phased half duty cycle clocks to convolve a differential input signal with the four phased half duty cycle clocks to concurrently generate a differential in-phase output signal and a differential quadrature-phase output signal on a dual differential output port.
摘要:
A bias generator comprises a first transistor and a second transistor having a control port connected to a control port of the first transistor and to an input port of the second transistor, where a second current through the second transistor is greater than a first current through the first transistor. The current through the bias generator is minimized by providing the different currents through the transistors having a similar size.
摘要:
In one embodiment of the invention, a method for convolution of signals is disclosed including generating four phased half duty cycle clocks each being out of phase by a multiple of ninety degrees from the others; coupling the four phased half duty cycle clocks into a four phase half duty cycle mixer; and switching switches in the four phase half duty cycle mixer in response to the four phased half duty cycle clocks to convolve a differential input signal with the four phased half duty cycle clocks to concurrently generate a differential in-phase output signal and a differential quadrature-phase output signal on a dual differential output port.
摘要:
A two-step tuning process for resistors and capacitors in an integrated circuit is described. In the first step of the tuning process, an on-chip adjustable resistor is tuned based on an external resistor to obtain a tuned resistor. The value of the tuned resistor is accurate to within a target percentage determined by the external resistor and the design of the adjustable resistor. In the second step, an adjustable capacitor is tuned based on the tuned resistor and an accurate clock to obtain a tuned capacitor having an accurate value. The adjustable capacitor may be tuned such that an RC time constant for the tuned resistor and the tune capacitor is accurate to within a target percentage determined by the accurate clock and the design of the adjustable capacitor. The resistors and capacitors of other circuits on the integrated circuit may be adjusted based on the tuned resistor and the tuned capacitor, respectively.
摘要:
In one embodiment of the invention, a method for convolution of signals is disclosed including generating four phased half duty cycle clocks each being out of phase by a multiple of ninety degrees from the others; coupling the four phased half duty cycle clocks into a four phase half duty cycle mixer; and switching switches in the four phase half duty cycle mixer in response to the four phased half duty cycle clocks to convolve a differential input signal with the four phased half duty cycle clocks to concurrently generate a differential in-phase output signal and a differential quadrature-phase output signal on a dual differential output port.
摘要:
A two-step tuning process for resistors and capacitors in an integrated circuit is described. In the first step of the tuning process, an on-chip adjustable resistor is tuned based on an external resistor to obtain a tuned resistor. The value of the tuned resistor is accurate to within a target percentage determined by the external resistor and the design of the adjustable resistor. In the second step, an adjustable capacitor is tuned based on the tuned resistor and an accurate clock to obtain a tuned capacitor having an accurate value. The adjustable capacitor may be tuned such that an RC time constant for the tuned resistor and the tune capacitor is accurate to within a target percentage determined by the accurate clock and the design of the adjustable capacitor. The resistors and capacitors of other circuits on the integrated circuit may be adjusted based on the tuned resistor and the tuned capacitor, respectively.