An electronic circuit includes a differential output circuit that produces a differential output signal at a differential output. A primary winding of a balun has a first balun terminal coupled to a first differential output terminal, and a second balun terminal coupled to a second differential output terminal. A configurable harmonic reduction circuit includes first and second configurable shunt capacitance circuits coupled between the first differential output terminal or the second differential output terminal, respectively, and a ground reference node. A control circuit receives tuning data associated with a calibrated tuning state. The tuning data indicates a first and second calibrated capacitance values, which are unequal, for the first and second configurable shunt capacitance circuits, respectively. The control circuit controls the first configurable shunt capacitance circuit to have the first calibrated capacitance value, and controls the second configurable shunt capacitance circuit to have the second calibrated capacitance value.

Disclosed herein are transimpedance circuits, as well as related methods and devices. In some embodiments, a transimpedance circuit may include a current source bias terminal, a current source output terminal, and a transimpedance amplifier coupled to the current source output terminal, wherein voltage signals at the current source bias terminal are correlated with voltage signals at the current source output terminal. In some embodiments, the current source may be a photodiode.

An electronic circuit includes a differential output circuit that produces a differential output signal at a differential output. A primary winding of a balun has a first balun terminal coupled to a first differential output terminal, and a second balun terminal coupled to a second differential output terminal. A configurable harmonic reduction circuit includes first and second configurable shunt capacitance circuits coupled between the first differential output terminal or the second differential output terminal, respectively, and a ground reference node. A control circuit receives tuning data associated with a calibrated tuning state. The tuning data indicates a first and second calibrated capacitance values, which are unequal, for the first and second configurable shunt capacitance circuits, respectively. The control circuit controls the first configurable shunt capacitance circuit to have the first calibrated capacitance value, and controls the second configurable shunt capacitance circuit to have the second calibrated capacitance value.

A system may include a front end differential amplifier having two input terminals, two input resistors, each of the two input resistors coupled to a respective one of the two input terminals, and an input common mode biasing circuit for an output stage of the front end differential amplifier, the input common mode biasing circuit comprising two current sources configured to generate currents for biasing the output stage of the front end differential amplifier.

A system may include a front end differential amplifier having two input terminals, two input resistors, each of the two input resistors coupled to a respective one of the two input terminals, and an input common mode biasing circuit for an output stage of the front end differential amplifier, the input common mode biasing circuit comprising two current sources configured to generate currents for biasing the output stage of the front end differential amplifier.

Disclosed herein are transimpedance circuits, as well as related methods and devices. In some embodiments, a transimpedance circuit may include a current source bias terminal, a current source output terminal, and a transimpedance amplifier coupled to the current source output terminal, wherein voltage signals at the current source bias terminal are correlated with voltage signals at the current source output terminal. In some embodiments, the current source may be a photodiode.

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.

Disclosed is a differential amplifier including an input circuit, a detecting and controlling circuit, and an output circuit. The input circuit outputs input current to two output nodes according to the voltage of a differential input signal and the voltage of a bias node. The detecting and controlling circuit outputs compensative current to the two output nodes according to control bias voltage and the voltage of the bias node, in which the voltage of the bias node and the compensative current relate to the voltage of the differential input signal. The output circuit is coupled to the two output nodes and outputs a differential output signal according to the sum of the input current and the compensative current. Due to the detecting and controlling circuit outputting the compensative current, the differential amplifier prevents itself from entering a deadlock state even though the input current is insufficient or zero.

Disclosed is a differential amplifier including an input circuit, a detecting and controlling circuit, and an output circuit. The input circuit outputs input current to two output nodes according to the voltage of a differential input signal and the voltage of a bias node. The detecting and controlling circuit outputs compensative current to the two output nodes according to control bias voltage and the voltage of the bias node, in which the voltage of the bias node and the compensative current relate to the voltage of the differential input signal. The output circuit is coupled to the two output nodes and outputs a differential output signal according to the sum of the input current and the compensative current. Due to the detecting and controlling circuit outputting the compensative current, the differential amplifier prevents itself from entering a deadlock state even though the input current is insufficient or zero.

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.