A device of integration of an electric current received on an integration node, includes an operational amplifier, an integration capacitor, and a circuit for modifying an output voltage of the operational amplifier formed by a charge transfer circuit configured to be connected on the integration node and to transfer charges into the integration capacitor. The device also includes a comparison circuit configured to trigger the modification circuit at least once during the integration duration, and a storage circuit configured to store the number of triggerings which have occurred during the integration duration. The received electric current is calculated according to the output voltage as well as to the number of triggerings multiplied by the modification of the output voltage induced by the modification circuit.

A method and apparatus in a receiver to determine if a high speed communication link is in an idle mode or in an active mode. Signals during the idle mode are of lower amplitude and lower frequency compared to amplitude and frequency in the active mode. A signal detector in the receiver determines if the high speed communication link has transitioned from idle mode to active mode and, if so, wakes up high power circuitry in the receiver to receive data.

A signal processing circuit includes a signal receiving circuit for generating a first input signal and a second input signal; a signal output circuit for generating a first output signal and a second output signal according to the first input signal and the second input signal; a negative impedance circuit, for amplifying the first input signal at the first input terminal to generate a first amplified input signal at the second output terminal, and for amplifying the second input signal at the second input terminal to generate a second amplified input signal at the first output terminal; a first capacitor; a second capacitor; wherein the first capacitor and the second capacitor have different DC voltage levels at both terminals, such that the impedance-signal variation rate of the negative impedance circuit is lower than a predetermined level.

Transimpedance amplifiers with feedforward current are provided herein. In certain embodiments, an amplifier system includes a transimpedance amplifier that amplifies an input current received at an input to generate an output voltage at an output. The amplifier system further includes a controllable current source that is coupled to the output of the transimpedance amplifier, and operable to provide a feedforward current that changes in relation to the input current of the transimpedance amplifier. By providing a feedforward current in this manner, gain and speed performance of the transimpedance amplifier is enhanced.

The present invention relates to an amplification device (10) of an input signal comprising: a first amplification stage (12), a second amplification stage (14), each amplification stage (12, 14) comprising: a switching circuit (22), the switching circuit (22) being able to generate, as output (22A, 22B), a switched signal having at least two states, and an inductive element (24) able to smooth the switched signal to obtain a smoothed signal (I1, I3), the smoothed signal (I1, I3) having a useful component and a stray component. The amplification device (10) further comprises a compensation circuit (16), for each amplification stage (12, 14), able to generate a compensation signal (I2, I4) of the stray component of the smoothed signal (I1, I3) generated in the inductive element (24) of the corresponding amplification stage (12, 14).

A front-end circuit includes: a filter that converts an unbalanced radio frequency signal inputted to an input terminal into two balanced radio frequency signals, and outputs one of the two balanced radio frequency signals from an output terminal and the other of the two balanced radio frequency signals from another output terminal; a low-noise amplifier connected to the output terminal; and a low-noise amplifier connected to the other output terminal.

An electronic circuit for a micro-electro-mechanical systems gyroscope is disclosed. The electronic circuit includes a current buffer, a transimpedance amplifier coupled with the current buffer, and a plurality of transistors. An inverting input terminal of the current buffer and a non-inverting input terminal of the current buffer are connected with a plurality of first resistors. The inverting input terminal of the current buffer is connected with a source of one of the plurality of transistors, and the non-inverting input terminal of the current buffer is connected with a source of another one of the plurality of transistors. The plurality of first resistors are connected to a ground. The current buffer is configured to isolate a load in the micro-electro-mechanical systems gyroscope from the transimpedance amplifier.

A pixel circuit includes a differential amplifier. The differential amplifier includes a non-inverting input terminal, an inverting input terminal, and an output terminal. The differential amplifier includes an input differential pair including first and second NMOS transistors, a current mirror pair including PMOS transistors, and a constant current source including a fifth NMOS transistor. A threshold voltage of each of the first and second NMOS transistors is higher than a threshold voltage of the fifth NMOS transistor. Further, the threshold voltage of each of the first and second NMOS transistors is higher than a threshold voltage of another NMOS transistor.

Devices including a transistor having a parasitic capacitance between a control terminal and a load terminal of a first type are provided. Furthermore, the devices include advantageously arranged inductances which are electromagnetically coupled to one another and are configured at least partly to compensate for an effect of the parasitic capacitance in a range around a resonant frequency.

A differential amplifier circuit includes a differential pair including a first field-effect transistor (FET) and a second FET, a first current source that generates a current which flows in the first FET and the second FET, and an output circuit that outputs an output voltage corresponding to a difference between a gate voltage of the first FET and a gate voltage of the second FET in accordance with an operation of the differential pair. A back gate of the first FET is connected to a gate of the first FET, and a back gate of the second FET is connected to a gate of the second FET. A first feedback voltage corresponding to the output voltage is input to the gate of the second FET.