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US 9,958,485 B2Granted
On-chip millimeter-wave power detection circuit
AssigneeQUALCOMM Incorporated
InventorOri Sasson
Life of this patent
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Abstract
An on-chip millimeter wave power detection circuit comprises a high resistive probe for voltage sensing of millimeter wave signals, the probe comprises a metal line perpendicularly connected to a transmission line, at one end, and further connected to a power root mean square (RMS) detector at the other end; and the RMS detector for measuring a RMS voltage value of the sensed millimeter wave signals, wherein the RMS detector is characterized by a known impedance.
Claims19
An apparatus for detecting power, comprising:
- a power root mean square (RMS) detector;
- a high impedance probe for voltage sensing of signals, the probe comprising a metal line connected to the power root mean square (RMS) detector, wherein the metal line is connected to a transmission line, and wherein a dimension of the probe is configured for impedance matching with one or more elements of the power RMS detector wherein the power RMS detector is configured to measure a RMS voltage value of the sensed signals, and wherein the power RMS detector comprises:
- an input capacitor coupled to the high-impedance probe;
- an n-channel metal-oxide semiconductor (NMOS) transistor coupled to the input capacitor, the transistor being configured to perform a squaring function on the sensed signals;
- and
- an output filter configured to generate a filtered signal based on the squared signals and provide the filtered signal to an output node, wherein a drain of the NMOS transistor is only connected to the output filter.
3 more elements
A method for power detection, comprising:
- sensing signals with a high impedance probe, wherein the probe comprises a metal line connected to a power root mean square (RMS) detector, wherein the metal line is connected to a transmission line, and wherein a dimension of the probe is configured for impedance matching with one or more elements of the power RMS detector;
- and
- measuring a RMS voltage value of the sensed signals via the power RMS detector, wherein the power RMS detector comprises:
- an input capacitor coupled to the high-impedance probe;
- an n-channel metal-oxide semiconductor (NMOS) transistor coupled to the input capacitor, the transistor being configured to perform a squaring function on the sensed signals;
- and
- an output filter configured to generate a filtered signal based on the squared signals and provide the filtered signal to an output node, wherein a drain of the NMOS transistor is only connected to the output filter.
4 more elements
A wireless device, comprising:
- an antenna;
- a radio-frequency integrated circuit (RFIC) comprising a transmission line coupled to the antenna;
- and
- a power root mean square (RMS) detector;
- and
- a high impedance probe for voltage sensing of signals, the probe comprising a metal line connected to the power RMS detector, wherein the metal line is connected to the transmission line, and wherein a dimension of the probe is configured for impedance matching with one or more elements of the power RMS detector, wherein the power RMS detector is configured to measure a RMS voltage value of the sensed signals, wherein the power RMS detector comprises:
- an input capacitor coupled to the high-impedance probe;
- an n-channel metal-oxide semiconductor (NMOS) transistor coupled to the input capacitor, the transistor being configured to perform a squaring function on the sensed signals;
- and
- an output filter configured to generate a filtered signal based on the squared signals and provide the filtered signal to an output node, wherein a drain of the NMOS transistor is only connected to the output filter.
7 more elements
Dependencies are inferred from the claim text.