Abstract: A micro-fluidic pump comprises one or more channels having an array of resistive heaters, an inlet, outlet and a substrate as a heat sink and a means of cooling the device. The pump is operated with a fire-to-fire delay and/or a cycle-to-cycle delay to control the pumping rate and minimize heating of liquid inside the pump during its operation.

Abstract: A micro-fluidic pump comprises one or more channels having an array of resistive heaters, an inlet, outlet and a substrate as a heat sink and a means of cooling the device. The pump is operated with a fire-to-fire delay and/or a cycle-to-cycle delay to control the pumping rate and minimize heating of liquid inside the pump during its operation.

Abstract: A micro-fluidic pump comprises one or more channels having an array of resistive heaters, an inlet, outlet and a substrate as a heat sink and a means of cooling the device. The pump is operated with a fire-to-fire delay and/or a cycle-to-cycle delay to control the pumping rate and minimize heating of liquid inside the pump during its operation.

Abstract: A fire pulse circuit for use in an inkjet printer includes an input control signal transmitted from a controller to a logic AND gate and to fire truncation logic; fire truncation logic adapted to truncate a pulse width of the input control signal to a maximum allowable pulse width if the duration of the pulse exceeds a maximum allowable time; a logic AND gate that receives inputs from both the input control signal and the fire truncation logic to produce an output fire pulse signal that operates to optimally fire an inkjet heater driver logic to heat the heater to nucleate ink from the print head. The circuit is formed from either a combination of digital and analog components or from exclusively digital components. A method of using the circuit to generate an output fire pulse to an inkjet heater driver logic is also disclosed.

Abstract: A micro-fluidic pump comprises one or more channels having an array of resistive heaters, an inlet, outlet and a substrate as a heat sink and a means of cooling the device. The pump is operated with a fire-to-fire delay and/or a cycle-to-cycle delay to control the pumping rate and minimize heating of liquid inside the pump during its operation.

Abstract: A micro-fluidic pump comprises one or more channels having an array of resistive heaters, an inlet, outlet and a substrate as a heat sink and a means of cooling the device. The pump is operated with a fire-to-fire delay and/or a cycle-to-cycle delay to control the pumping rate and minimize heating of liquid inside the pump during its operation.

Abstract: A fire pulse circuit for use in an inkjet printer includes an input control signal transmitted from a controller to a logic AND gate and to fire truncation logic; fire truncation logic adapted to truncate a pulse width of the input control signal to a maximum allowable pulse width if the duration of the pulse exceeds a maximum allowable time; a logic AND gate that receives inputs from both the input control signal and the fire truncation logic to produce an output fire pulse signal that operates to optimally fire an inkjet heater driver logic to heat the heater to nucleate ink from the print head. The circuit is formed from either a combination of digital and analog components or from exclusively digital components. A method of using the circuit to generate an output fire pulse to an inkjet heater driver logic is also disclosed.

Abstract: A printing apparatus is provided that precisely control the transition of an electrical signal that causes a printing substance to be deposited. In particular, in some embodiments, a circuit is configured to control the application of a firing pulse to a printing element, and the printing element is configured to control the application of a printing substance. The circuit in this embodiment is configured to condition or control the transition of the firing pulse from the first state to the second state such that current through the printing element dissipates to zero over a period of time that is neither too fast nor too slow.

Abstract: Micro-fluid ejection apparatuses and devices, and methods related to communication in and with the same. One such micro-fluid ejection apparatus includes a controller configured to generate a data signal, and a transmitter configured to convert the data signal to a current signal. The apparatus further includes a conductor capable of carrying the current signal, and a receiver configured to receive the current signal from the conductor and to convert the current signal to a second data signal. The micro-fluid ejection apparatus is configured to operate on the second data signal. In one embodiment, the micro-fluid ejection apparatus may be a printing apparatus, such as an inkjet printing apparatus. In some embodiments, the current signal comprises a pair of corresponding differential current signals and/or current transfer logic signals offset from a base amperage level.

Abstract: A printing apparatus and related methods are provided that precisely control the transition of an electrical signal that causes a printing substance to be deposited. In particular, in some embodiments, a circuit is configured to control the application of a firing pulse to a printing element, and the printing element is configured to control the application of a printing substance. The circuit in this embodiment is configured to condition or control the transition of the firing pulse from the first state to the second state such that current through the printing element dissipates to zero over a period of time that is neither too fast nor too slow.

Abstract: Disclosed is a method and/or apparatus for adjusting the sample time and order associated with a digital correction system for maximizing output power and minimizing power stage delay sensitivity of a switching power stage. In certain embodiments, the sample point of an ADC may be changed as a function of the duty ratio of the PWM signal thus allowing higher performance and use of less expensive power stage components. In addition, adjustment of the order of an integrating error amplifier in the system permits operation of the power stage with an output being permitted to saturate up to the power supply rails, thus increasing a power output of the power stage.