A power control circuit is presented. The circuit includes a pair of parallel optocoupler/logic stages and a pair of parallel voltage-to-current driver stages electrically coupled to a halfbridge stage in the order described. An input signal is communicated to the optocoupler/logic stage and processed therein to produce two distinctly separate but complimentary waveforms. Complimentary waveforms are communicated to the voltage-to-current driver stage to drive a paired arrangement of JFET switche...

The invention provides a semiconductor device having a transistor that can supply a proper current to a load (EL pixel and signal line) without being influenced by variations. A voltage of each terminal of a transistor is controlled by a feedback circuit using an amplifier circuit. A current Idata is inputted from a current source circuit to the transistor, and the feedback circuit sets a gate-source voltage that the transistor requires for supplying the current Idata. The feedback circuit contr...

Systems and methods for decreasing transmission timing variations include precharging a data channel at a level before data is sent over the channel. The driver sets the level in response to the reception of a precharging control signal.

A drive circuit has a level shift circuit which outputs level-shifted on and off signals each for controlling a power semiconductor element in an on or off state, a first RS flip flop which is supplied with the on signal through a setting input terminal and supplied with the off signal through a resetting input terminal, and which outputs a drive signal to the power semiconductor element, and a logic filter circuit which is provided between the level shift circuit and the first RS flip flop, and...

A power driver circuit is provided including a low voltage source, a high voltage source, at least one input signal line, an output node, and circuitry adapted to connect the output node to the low voltage source when the input signal line is in a first state and to the high voltage source when said input signal line is in a second state.

A drive circuit applies a drive voltage through an outputs terminal to a switching element. The drive circuit includes a supplying circuit, an amplifying circuit, a detecting circuit, and an adjusting circuit. In response to a control signal, the supplying circuit generates a first drive current. The amplifying circuit generates and applies a second drive current, which is larger than the first drive current, to the output terminal for changing the drive voltage. The detecting circuit is coupled...

Driver circuit for driving a useful signal having: (a) at least one amplifier circuit (3a, 3b) with low output impedance for the signal amplification of the useful signal; (b) a protection impedance (9a, 9b) respectively connected downstream of the amplifier circuit (3a, 3b) and serving to protect the amplifier circuit (3a, 3b); characterized in that (c) provision is respectively made of a feedback circuit (14a, 14b) for the frequency-dependent signal feedback of the useful signal amplified by t...

In order to improve the efficiency of a driver circuit for controlling upper and lower switching means (T3, T4) for converting a direct voltage Ud into a clocked output voltage Ua for a resonant converter with a high-voltage section (HT) for controlling the upper switching means (T3) and a low-voltage section (NT) for controlling the lower switching means (T4), which switch the switching means (T3, T4) on alternately to one another, the switch-on phases of the switching means (T3, T4) being sepa...

A device and method for automatically detecting and optimally compensating die leakage current under a wide range of leakage conditions. A variable or reconfigurable (self-adaptive) keeper tracks current leakage online (in real time). The control input to the keeper is coupled to a leakage current sensor, which is in turn coupled to a dummy cell that generates the exact leakage current as the load. The current sensor regulates the control input in real time to produce a leakage compensation enab...

An electronic circuit contains a driver circuit (12) with an output coupled to a digital communication conductor (14), for driving changes of a potential at the digital communication conductor (14) to and from a digital signal level. The driver circuit (12) comprises a control circuit (120), to generate selection signals that select increasingly stronger drive strengths and increasingly weaker drive strengths during changes to and from the digital level respectively. A controllable current suppl...