1. An output buffer circuit comprising:
an output stage where an NPN transistor and a PNP transistor are connected to each other in series between first and second power supplies, where emitters of the NPN and PNP transistors are used as output terminals, and where the NPN and PNP transistors operate in a complementary manner;
a prebuffer that drives the output buffer; and
a replica buffer formed by imitating the prebuffer,
wherein input bias current to be supplied to the transistors of the output stage of the output buffer is increased on the basis of output current of the replica buffer during transition of an output signal.
2. The output buffer circuit according to claim 1, wherein
the replica buffer and the prebuffer operate in accordance with a common input signal.
3. The output buffer circuit according to claim 2, wherein
the replica buffer consumes less current and has a smaller element size than the prebuffer.
4. The output buffer circuit according to claim 3,
wherein the replica buffer includes a replica buffer for output signal waveform rising edge and a replica buffer for output signal waveform falling edge provided separately,
wherein a waveform of input bias current of the NPN transistor of the output stage of the output buffer is controlled using output current of the replica buffer for output signal waveform rising edge, and
wherein a waveform of input bias current of the PNP transistor of the output stage of the output buffer is controlled using output current of the replica buffer for output signal waveform falling edge.
5. A driver circuit comprising:
a signal level generation circuit;
a prebuffer circuit that receives an output-buffer-circuit input signal generated by the signal level generation circuit; and
an output buffer circuit that is driven by the prebuffer circuit by receiving an output of the prebuffer circuit,
wherein an output-buffer-circuit output signal is transmitted to a device to be measured by driving an external transmission line using the output buffer circuit,
wherein the output buffer circuit includes:
an output buffer having an output stage where an NPN transistor and a PNP transistor are connected to each other in series between first and second power supplies, where emitters of the NPN and PNP transistors are used as output terminals, and where the NPN and PNP transistors operate in a complementary manner;
a prebuffer that drives the output buffer; and
a replica buffer formed by imitating the prebuffer, and
wherein input bias current to be supplied to the transistors of the output stage of the output buffer is increased on the basis of output current of the replica buffer during transition of an output signal.
6. The driver circuit according to claim 5, wherein the replica buffer and the prebuffer operate in accordance with a common input signal.
7. The driver circuit according to claim 6, wherein the replica buffer consumes less current and has a smaller element size than the prebuffer.
8. The driver circuit according to claim 7,
wherein the replica buffer includes a replica buffer for output signal waveform rising edge and a replica buffer for output signal waveform falling edge provided separately,
wherein a waveform of input bias current of the NPN transistor of the output stage of the output buffer is controlled using output current of the replica buffer for output signal waveform rising edge, and
wherein a waveform of input bias current of the PNP transistor of the output stage of the output buffer is controlled using output current of the replica buffer for output signal waveform falling edge.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A system for dispensing fluid from a container having an open end closed by a closure, the container including an inner chamber having a volume and including fluid therein, the system comprising:
a fluid dispenser; and
a receptacle having an aperture and an interior floor;
the fluid dispenser having a base with a first side and a second side, and a protrusion extending from the second side of the base and having an exterior diameter and a tip;
a flow passage extending through the protrusion, and
the protrusion adapted to extend into the fluid receptacle aperture with the tip remain spaced a desired distance from the interior floor of the receptacle.
2. The system of claim 1, wherein means are provided to maintain the tip of the protrusion a desired distance from the interior floor of the receptacle.
3. The system of claim 1, wherein at least one of the protrusion exterior diameter and the receptacle interior is configured to maintain the tip of the protrusion a desired distance from the interior floor of the receptacle.
4. The system of claim 1, wherein the interior wall of the receptacle is tapered to maintain the tip of the protrusion a desired distance from the interior floor of the receptacle.
5. The system of claim 1, wherein the second side of the fluid dispenser base contacts the receptacle to maintain the tip of the protrusion a desired distance from the interior floor of the receptacle.
6. The system of claim 1, wherein the protrusion has an associated length Lp and the aperture has an associated length within the receptacle Ld, wherein Lp is less than Ld to maintain the tip of the protrusion a desired distance from the interior floor of the receptacle.
7. The system of claim 1, wherein the receptacle has an interior projection to maintain the tip of the protrusion a desired distance from the interior floor of the receptacle.
8. A method of transferring fluid from a container directly into a receptacle, the container closed by a closure and having a fluid therein, the receptacle having an aperture and an interior floor, the method comprising the steps of:
providing a fluid dispenser, the fluid dispenser having a base with a first side and a second side, a protrusion extending therefrom, the protrusion having a dispenser tip;
inserting the fluid dispenser through the closure and into the interior of the container;
inserting the fluid dispenser tip into the receptacle aperture, and
moving the receptacle and container relative to each other to flex the closure to dispense fluid directly from the container into the receptacle.
9. The method of claim 8, and further including the step of maintaining the tip of the protrusion a desired distance from the interior floor of the receptacle.
10. The method of claim 9, wherein the step of maintaining the tip of the protrusion a desired distance from the interior floor of the receptacle comprises the step of abutting the second side of the fluid dispenser base with the receptacle.