In at least one embodiment, a differential amplifier including first and second current transfer systems, a current difference producing system, and a feedback network circuit is provided. The first current transfer system generates a first differential current signal. The second current transfer system generates a second differential current signal. The current difference producing system receives the first differential current signal and the second differential current signal and generates a voltage difference signal that is indicative of a difference between a first current signal and a second current signal. The feedback network circuit converts the voltage difference signal into at least two converted current signals and provides the at least two converted current signals to one of the first and second current transfer systems or the current difference producing system to minimize the difference between the first current signal and the second current signal.

In at least one embodiment, a differential amplifier including first and second current transfer systems, a current difference producing system, and a feedback network circuit is provided. The first current transfer system generates a first differential current signal. The second current transfer system generates a second differential current signal. The current difference producing system receives the first differential current signal and the second differential current signal and generates a voltage difference signal that is indicative of a difference between a first current signal and a second current signal. The feedback network circuit converts the voltage difference signal into at least two converted current signals and provides the at least two converted current signals to one of the first and second current transfer systems or the current difference producing system to minimize the difference between the first current signal and the second current signal.

An instrumentation amplifier configured for providing high common mode rejection is described and includes an input differential stage configured to receive a differential input voltage and a folded cascode amplifying stage configured to receive output current mode signals provided from the input differential pair. A plurality of feedback networks is provided to improve the input stage. The amplifier may operate to provide an enhanced common mode rejection ratio of a single gain block in the instrumentation amplifier. In some examples, the circuitry may have a differential folded cascode amplifying stage which permits high precision and low distortion of amplified signals without degrading the common mode rejection ratio.

An instrumentation amplifier configured for providing high common mode rejection and low distortion is described and includes an input differential pair configured to receive a differential input voltage and differential feedback voltage and a folded cascode amplifying stage configured to receive output current mode signals provided from the input differential pair. A current mirror is configured to mirror output current mode signals provided from said folded cascode amplifying stage. An external gain setting configuration may include a resistor feedback network, which includes a first resistor being connected between feedback inputs of said input differential pair, a second resistor between an output terminal of the current mirror and a first feedback input of said input differential pair, a third resistor between a common terminal and a second feedback input of said input differential pair.

An instrumentation amplifier configured for providing high common mode rejection and low distortion is described and includes an input differential pair configured to receive a differential input voltage and differential feedback voltage and a folded cascode amplifying stage configured to receive output current mode signals provided from the input differential pair. A current mirror is configured to mirror output current mode signals provided from said folded cascode amplifying stage. An external gain setting configuration may include a resistor feedback network, which includes a first resistor being connected between feedback inputs of said input differential pair, a second resistor between an output terminal of the current mirror and a first feedback input of said input differential pair, a third resistor between a common terminal and a second feedback input of said input differential pair.

An instrumentation amplifier configured for providing high common mode rejection is described and includes an input differential stage configured to receive a differential input voltage and a folded cascode amplifying stage configured to receive output current mode signals provided from the input differential pair. A plurality of feedback networks is provided to improve the input stage. The amplifier may operate to provide an enhanced common mode rejection ratio of a single gain block in the instrumentation amplifier. In some examples, the circuitry may have a differential folded cascode amplifying stage which permits high precision and low distortion of amplified signals without degrading the common mode rejection ratio.

An instrumentation amplifier configured for providing high common mode rejection is described and includes an input differential stage configured to receive a differential input voltage and a folded cascode amplifying stage configured to receive output current mode signals provided from the input differential pair. A plurality of feedback networks is provided to improve the input stage. The amplifier may operate to provide an enhanced common mode rejection ratio of a single gain block in the instrumentation amplifier. In some examples, the circuitry may have a differential folded cascode amplifying stage which permits high precision and low distortion of amplified signals without degrading the common mode rejection ratio.