91 results about "Process compensation" patented technology

A voltage control oscillator, outputting a clocking signal with a specific frequency according to an input voltage level, has a constant current source, a voltage / current converter, a current mirror and an oscillating circuit. The constant current source provides a predetermined reference current. The voltage / current converter is coupled to the constant current source, for determining a first current flowing through the voltage / current converter according to the input voltage. The current mirror has a first current terminal coupled to the constant current source, for determining a third current flowing through a second current terminal according to the second current flowing through the first current terminal, wherein the second current is the reference current subtracted by the first current. The oscillating circuit is coupled to the second current terminal of the current mirror, for determining a frequency of the clocking signal according to the third current.

A system for generating a supply voltage, temperature and process compensated gain control voltage from a digital data word. In particular, the compensated gain voltage control voltage maintains a linear relationship between a change in gain in response to an input gain control voltage for a gain circuit of a transmitter circuit. A monitor circuit senses at least one of the supply voltage, temperature and process parameters, and generates a first set of digital signals corresponding to the sensed parameter. A digital compensator circuit converts the input gain control voltage into a second set of digital signals, and decodes the combined first and second set of digital signals to provide a data word. The data word is converted into an analog voltage representing the compensated gain voltage control voltage. The digital compensator circuit includes a table of compensation values, each accessible by a distinct combination of the first and second set of digital signals.

The present invention provides an apparatus and method for performing surface property measurements, such as workpiece hardness and other material property measurements, with in-process compensation for instrument frame distortion and the like. The apparatus includes a substantially rigid base; a stylus coupled to the substantially rigid base, the stylus configured and selectively positioned to interact with a surface of a specimen at points along a central axis of the stylus; a proximity detector sensor coupled to the substantially rigid base, the proximity detector sensor disposed at a predetermined distance from the surface of the specimen and operable for sensing the predetermined distance between the proximity detector sensor and the surface of the specimen; and a proximity detector actuator coupled to the substantially rigid base, the proximity detector actuator operable for maintaining the predetermined distance between the proximity detector sensor and the surface of the specimen as the substantially rigid base and the stylus are moved with respect to the surface of the specimen along the central axis of the stylus.

The invention discloses a high-accuracy oscillator. The high-accuracy oscillator comprises a voltage reference module, a compensating current generating module and an annular oscillator; the voltage reference module comprises a plurality of detected field-effect tubes, process corner detection is conducted on the detected field-effect tubes to generate reference voltage comprising process corner information of the detected field-effect tubes, and the reference voltage is input into the compensating current generating module; temperature compensation is conducted on the reference voltage by the compensating current generating module, currents having process compensation and temperature compensation are generated, and the compensating current generating module inputs the generated currents into the annular oscillator; the annular oscillator receives the currents generated by the compensating current generating module, and clocks having stable frequency are output according to the currents. According to the high-accuracy oscillator, process compensation and temperature compensation are designed independently and do not affect each other, and regulation is facilitated; in addition, frequency of the output clocks is not affected by the process and the temperature, and accuracy of the output clocks is improved.