摘要:
The present invention relates to a low-voltage self-calibrated peak detector (100). Using a two-step calibration process that compensates the offset errors introduced by the respective first, second and third comparators (122, 128, 130), the peak detection is made accurate whatever temperature, process or mismatch spreads. Its input bandwidth can be as high as the bandwidth of an operational amplifier of unity gain. In a rail-to-rail configuration, it can be implemented into a fully differential low-voltage self-calibrated CMOS peak detector (200), which can have a very high conversion gain (α) and a very high input signal dynamic ranging.
摘要:
Apparatus for generating an output dependent upon the impedance or at least one component of the impedance of a device, the apparatus comprising: a load component (2) having a known impedance or at least one component thereof for connection in series with the device to allow for the measurement of a voltage drop across the load component (2); a generator arrangement for applying a signal having a voltage to the series connected load component and device; a measurement arrangement adapted to measure a first voltage one side of said load component (2), and one of a second voltage on the other side of said load component (2) or a difference voltage comprising the voltage difference across said load device; and a signal processing arrangement for processing the measurements to generate an output dependent upon the impedance or at least one component of the impedance of the device, wherein said processing arrangement is adapted to: determine a first parameter indicative of the complex amplitude of the first voltage on a first side of said load component connected to said device, and a second parameter indicative of the complex amplitude of said difference voltage or a calculated difference voltage comprising the difference between the first and second voltages; multiply each of the first and second determined parameters by the complex conjugate of the second determined parameter to generate third and fourth parameters respectively; and compare said third and fourth parameters to generate an output or compare one or more components or derivatives of the third parameter and said fourth parameter to generate said output.
摘要:
A proximity sensor for sensing the proximity of a target comprising: an electrical component for sensing the proximity of the target, said electrical component having electrical properties that vary with the proximity of the target; an impedance component (21) having a known impedance and a first end connected to a first end of said electrical component; a switch (31) connected to switch between said first end of said impedance component (21) and a second end of said impedance component (21); a signal generator connected to said second end of said impedance component (21) for generating an electrical signal for application to the impedance component and electrical component; an analogue-to-digital converter for receiving an electrical signal and for generating a digital signal; and a processor connected to the analogue-to-digital converter for receiving a digital voltage signal and for generating a proximity signal, wherein said processor (23) is adapted to control said switch to switch (31) to connect to said first and second ends of said impedance component sequentially.
摘要:
Provided are a method for correcting measurement errors and an electronic component characteristics measurement device that can improve the correction precision by eliminating the correction errors caused by leakage signal components between the ports of the measurement jigs. An equation CA ij that correlates measurement values in a test measurement jig mounted state with measurement values in a standard measurement jig mounted state is determined from a result of measuring electric characteristics S D , S T on correction data obtaining samples having different electric characteristics with each other in a state in which they are mounted on a standard measurement jig 20 and on a test measurement jig 30. The equation CA ij is an equation that assumes presence of leakage signals that are directly transmitted between at least two ports of at least one of the standard measurement jig and the test measurement jig. By using the equation CA ij determined by measuring the electric characteristics on an arbitrary electronic component in a state in which it is mounted on the test measurement jig 30, the electric characteristics that would be obtained if measured on the electronic component in a state in which it is mounted on the standard measurement jig 20 are calculated.
摘要:
Embodiments describe methods of correcting S-parameter measurements for a DUT. The method includes coupling at least one tracking module associated with a set of electrical standards to a S-parameter measurement device to form a test system. An initial calibration for the test system is then determined. This may include measuring the S-parameters of the electrical standards, generating a calibration along a calibration plane, generating a calibration along a correction plane and determining at least one error adapter from the calibrations. The DUT is coupled to the test system and the S-parameters of the DUT are measured. Changes in the initial calibration are tracked using the tracking modules. Tracking may include measuring the S-parameters of the electrical standards, generating a correction plane calibration and generating a corrected calibration plane calibration from the correction plane calibration and the error adapter(s). The measured S-parameters are corrected using the tracked changes.