| Patent application number | Description | Published |
|---|
| 20080291069 | DELTA SIGMA MODULATOR - In a delta sigma modulator including first and second integration circuits connected in cascade, each as a component thereof, first and second power source terminals for supplying first and second different power source voltages to the first and second integration circuits are provided. The first power source voltage is supplied to the former-stage first integration circuit having a SNR which is largely affected by the magnitude of the power source voltage. The second power source voltage lower than the first power source voltage is supplied to the latter-stage second integration circuit having a SNR which is not largely affected by the magnitude of the power source voltage. | 11-27-2008 |
| 20100057384 | PHYSICAL QUANTITY DETECTION CIRCUIT AND PHYSICAL QUANTITY SENSOR DEVICE - A physical quantity detection circuit ( | 03-04-2010 |
| 20100066423 | PHYSICAL QUANTITY DETECTION CIRCUIT AND PHYSICAL QUANTITY SENSOR DEVICE - A physical quantity detection circuit ( | 03-18-2010 |
| 20100126271 | INERTIAL VELOCITY SENSOR SIGNAL PROCESSING CIRCUIT AND INERTIAL VELOCITY SENSOR DEVICE INCLUDING THE SAME - An inertial velocity sensor signal processing circuit ( | 05-27-2010 |
| 20100237909 | PHYSICAL QUANTITY DETECTION CIRCUIT AND PHYSICAL QUANTITY SENSOR DEVICE - A physical quantity detection circuit ( | 09-23-2010 |
| 20110179868 | PHYSICAL QUANTITY SENSOR SYSTEM AND PHYSICAL QUANTITY SENSOR DEVICE - A physical quantity sensor system drives a physical quantity sensor and detects a physical quantity signal from a sensor signal. An analog-to-digital conversion circuit respectively converts a monitor signal and the sensor signal to a digital monitor signal and a digital sensor signal. A drive control circuit controls a drive signal according to the digital monitor signal. A phase adjustment circuit adjusts the phase difference between the digital monitor signal and the digital sensor signal. A detection circuit detects the physical quantity signal by multiplying the digital monitor signal by the digital sensor signal after the phase difference adjustment by the phase adjustment circuit. | 07-28-2011 |
| 20110179872 | DRIVE CIRCUIT AND PHYSICAL QUANTITY SENSOR DEVICE - An amplitude detection circuit detects the amplitude value of a monitor signal responsive to self-excited vibration of a physical quantity sensor. A waveform shaping circuit converts the monitor signal to a pulse signal. A pulse amplitude modulation circuit adjusts the amplitude of the pulse signal according to the amplitude value obtained by the amplitude detection circuit and outputs the result as a drive signal for control of the self-excited vibration of the physical quantity sensor. | 07-28-2011 |
| 20110260788 | AMPLIFIER DEVICE AND SENSOR MODULE - A first low-pass filter circuit includes a first input terminal which receives a sensor signal, a second input terminal, and an output terminal which outputs a first output signal. A second low-pass filter circuit includes an input terminal connected to the second input terminal of the first low-pass filter circuit, and an output terminal. A third low-pass filter circuit includes an input terminal connected to the output terminal of the second low-pass filter circuit, and an output terminal which outputs a second output signal. | 10-27-2011 |
