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| Number | Title | Issue Date |
| 7528670 | Sine wave oscillator having a self-startup circuit Disclosed herein is a sine wave oscillator having a self-startup circuit. The sine wave oscillator can start up and output sine waves having a constant frequency without receiving any signals other than supply voltage. The sine wave oscillator includes an operationa... | 05/05/2009 |
| 7248128 | Reference oscillator frequency stabilization Method for stabilizing the frequency of a MEMS (Micro Electro Mechanical Systems) reference oscillator, and a MEMS reference oscillator, wherein the method comprises following steps: using two or more MEMS components, wherein each MEMS component is characterized by ... | 07/24/2007 |
| 7157982 | Wien-Robinson oscillator with stabilized output voltage In a Wien-Robinson oscillator, a negative feedback path and a positive feedback path are arranged between the output of an operational amplifier and a reference ground potential. The negative feedback path contains two resistors which are connected in series and who... | 01/02/2007 |
| 6504436 | Transconductance tuning circuit with independent frequency and amplitude control A tuning circuit includes an oscillator that receives an oscillating input signal and a control signal, and generates an oscillating output signal. The control signal is obtained from a frequency control circuit that compares the phases of the oscillating... | 01/07/2003 |
| 6300844 | Oscillator starting method The present invention relates to a device for generating a sinewave output signal and comprising an oscillator. The oscillator includes means for respectively connecting and disconnecting one of the device supply voltages, such that when connecting said s... | 10/09/2001 |
| 5764702 | Recovery of timing signals The device for the recovery of a timing signal comprises a oscillator (3) which includes an amplifier (4); a first impedance (Z1) connected between a first input and the output of the amplifier and a second impedance (Z2) also connected between the first ... | 06/09/1998 |
| 5277495 | Temperature to frequency converter A temperature to frequency converter includes two temperature detectors having an electrical characteristic, such as resistance, that varies proportionally with sensed temperature. These devices are connected into an oscillator circuit that provides an el... | 01/11/1994 |
| 4724401 | Adaptive oscillator apparatus for use in a phase-lock loop A phase-lock loop system incorporates a normally "transparent" oscillator used in detecting whether or not the system is in a locked condition. It is essential that the oscillator, a portion of which is serially involved in the phase-lock loop, have a lon... | 02/09/1988 |
| 4724402 | Phase-locked loop apparatus using an embedded oscillator as a lock detection means An embedded circuit is placed in a phase-locked loop having the normal phase detector and voltage-controlled oscillator. The embedded circuit is transparent to phase-locked conditions of the loop and becomes operative in an oscillatory mode only when the ... | 02/09/1988 |
| 4188593 | RC Oscillator An RC oscillator comprising an amplifier with a first RC voltage divider coupling its output circuit to its non-inverting input circuit and a second RC voltage divider coupling its non-inverting input circuit to its inverting input circuit. The first RC v... | 02/12/1980 |
| 3940715 | Distortion measurement system A distortion measurement system for measuring distortion as low as 0.002% includes an ultra low distortion oscillator having a relatively fast response which is achieved by switching the time constant of the control loops of the oscillator during settling... | 02/24/1976 |
