An electrical system includes a power supply and an electrical circuit coupled to the power supply and including an operational amplifier. The operational amplifier includes an input stage and a pre-driver stage coupled to the input stage, wherein the pre-driver stage includes a first input terminal, a second input terminal, and a voltage supply terminal. The operational amplifier also includes an output stage with bipolar transistors coupled to the pre-driver stage. The pre-driver stage is configured to: detect a voltage differential across the first and second input terminals of the pre-driver stage; and provide an adjustable bias current based on the voltage differential.

Embodiments relate to systems, methods and computer-readable media to enable design and creation of receiver circuitry. One embodiment is a receiver apparatus comprising a first resistor connected to a first receiver input, four N-type metal oxide semiconductor (NMOS) field effect transistors (FETs), two PMOS FETS, and a trans-impedance amplifier wherein an input terminal of the trans-impedance amplifier is connected to a drain terminal of the second NMOS FET. Additional embodiments including other circuitry, associated methods, and media comprising instructions associated with generation of circuit design files are also described.

A circuit includes a first transconductance stage having an output. The circuit further includes an output transconductance stage, and a first source-degenerated transistor having a first control input and first and second current terminals. The first control input is coupled to the output of the first transconductance stage. The circuit also includes a second transistor having a second control input and third and fourth current terminals. The third current terminal is coupled to the second current terminal and to the output transconductance stage.

In an embodiment a device includes an input node configured to receive a first current, an output node configured to provide a second current determined by the first current, a first resistor having a first terminal connected to the input node and a second terminal coupled to a first node configured to receive a first supply voltage, a first MOS transistor having a source connected to the first node and a drain coupled to the output node of the device, a second resistor having a first terminal connected to a gate of the first MOS transistor, a biasing circuit configured to provide a biasing voltage on a second terminal of the second resistor and a first capacitor connected between the input node and the gate of the first MOS transistor.

A circuit includes a first transconductance stage having an output. The circuit further includes an output transconductance stage, and a first source-degenerated transistor having a first control input and first and second current terminals. The first control input is coupled to the output of the first transconductance stage. The circuit also includes a second transistor having a second control input and third and fourth current terminals. The third current terminal is coupled to the second current terminal and to the output transconductance stage.

A power supply switching circuit (100) and methodology are disclosed for connecting the greater of first and second power supplies (V.sub.SUP1, V.sub.SUP2) to an output voltage node (V.sub.OUT) with a comparator (102), active power supply switching circuit (103), gate driver circuit (106), and switching array (SW1-SW5) to generate control signals for a pair of PMOS power switches (MP1, MP2) by remapping first and second voltage supplies (V.sub.SUP1, V.sub.SUP2) to bias the n-wells of the PMOS power switches while simultaneously driving the gate terminals of the PMOS power switches with the gate driver circuit (106) only in response to a comparator activation signal by generating overlapping phase signals (PHI_1, PHI_2) which controls timing of first and second power supply selection signals so that a ground voltage is supplied as the first power supply selection signal only after the maximum bias voltage is supplied as the second power supply selection signal.

An amplifier includes a first input transistor, a second input transistor, a first current mirror circuit, and a second current mirror circuit. The first input transistor is coupled to a first input terminal. The second input transistor is coupled to a second input terminal. The first current mirror circuit is coupled to the first input transistor and the second input transistor. The second current mirror circuit is coupled to the first input transistor, the second input transistor, and the first current mirror circuit.

An electrical system includes a power supply and an electrical circuit coupled to the power supply and including an operational amplifier. The operational amplifier includes an input stage and a pre-driver stage coupled to the input stage, wherein the pre-driver stage includes a first input terminal, a second input terminal, and a voltage supply terminal. The operational amplifier also includes an output stage with bipolar transistors coupled to the pre-driver stage. The pre-driver stage is configured to: detect a voltage differential across the first and second input terminals of the pre-driver stage; and provide an adjustable bias current based on the voltage differential.

A circuit includes a first transconductance stage having an output. The circuit further includes an output transconductance stage, and a first source-degenerated transistor having a first control input and first and second current terminals. The first control input is coupled to the output of the first transconductance stage. The circuit also includes a second transistor having a second control input and third and fourth current terminals. The third current terminal is coupled to the second current terminal and to the output transconductance stage.

An operational amplifier circuit in a display apparatus which is fast-acting to prevent voltage overshoot comprises a pre-operational amplifier module, an output operational amplifier module, and an output module. Driving current from the pre-operational amplifier module is the basis of the output operational amplifier module generating a dynamic bias voltage to the output module. The output operational amplifier module detects the dynamic bias voltage and adjusts the bias voltage to be level with a specified voltage based on at least one control voltage. When the dynamic bias voltage is less than the specified voltage, the output operational amplifier module pulls up the bias voltage and when the bias voltage is larger than the specified voltage, the output operational amplifier module pulls down the bias voltage. The pull up and pull down speeds are proportional to the at least one control voltage.