Abstract: An integrated circuit (IC), comprising: a first input pin for receiving a first input signal; a first converter configured to convert the first input signal to a first output signal; a first gain stage configured to apply a first gain to the first output signal; gain update circuitry configured to: output a first external gain control signal to a first output pin of the IC; and subsequently output a first internal gain control signal to the first gain stage to update the first gain of the first gain stage, wherein output of the first internal gain control signal is delayed relative to output of the first external gain control signal by a first predetermined delay, the first predetermined delay to compensate for signal chain delay between the first input pin and the first gain stage, wherein the gain update circuitry comprises level detection circuitry configured to determine a signal level of the first input signal or the first output signal.

Abstract: The present disclosure relates to circuitry comprising audio amplifier circuitry for receiving an audio signal to be amplified; and first and second output nodes for outputting first and second differential output signals. The circuitry further comprises common mode buffer circuitry configured to receive a common mode voltage and to selectively output the common mode voltage to the first and second output nodes.

Abstract: An apparatus comprises a variable acoustic source and a microphone, both acoustically coupled to a volume having a fluid region and an air region. The apparatus also can include a processor to determine a volume of the air region based on signals received from the microphone and the variable acoustic source. A fluid valve is coupled to the processor, and is configured to allow an amount of fluid to exit the fluid region associated with the volume of the air region. An atomizer, coupled to the fluid region, is configured to aerosolize at least a portion of the fluid.

Abstract: Dispensing apparatus (1) for dispensing a liquid product (24) from a pressurized dispensing container (21) comprises a collapsible chamber metering valve (2) in which an elastomeric sleeve (4) overlays an external surface (53) of the valve body (6) to define a metering chamber (7) therebetween and is collapsible on actuation of the valve into substantially conformal contact with the external surface such that a volume of liquid is dispensed which is equal to the volume of liquid displaced from the metering chamber. The valve is nestably received within a cup (3) with seal means (15) operable between the mouth of the cup and an outer end of the valve such that a closed collecting chamber (11) is defined between the valve and the cup. Means (25) are provided to communicate in use between the collecting chamber and that part of the container in which a liquid product is contained when the container is held in a predetermined orientation for operation of the valve.

Abstract: A dispensing apparatus comprises a pressurised dispensing container (3), a housing (2) for the container defining a bore, the container having a body (50) which is axially slidable in the bore, the container having a collapsible metering valve (8) located at a first end (6) of the body for dispensing metered quantities of fluid and actuated by axial depression of a valve stem (9) defining a dispensing flowpath, a valve actuator (11) fixedly connected to the housing at a corresponding first end (7) thereof and defining a further dispensing flowpath for product fluid dispensed through the stem, and trigger means (30) operable to urge the container body axially towards the first end of the housing such that the valve stem is depressed by relative movement together of the valve and actuator and thereby dispensing a metered quantity of fluid, wherein the container body defines a chamber (4) and the container includes means (5) dividing the chamber into a product fluid reservoir (25) communicating with the valve an

Abstract: A collapsible chamber metering valve for use in a pressurized dispensing container 2 comprises a generally cylindrical body 3, an elastomeric sleeve 12 coaxially overlaying the body and defining a collapsible chamber 14 therebetween, the body defining an internal chamber 18, channel means 31 providing a fluid flowpath between the internal chamber and the collapsible chamber, an axially slidable valve actuating stem 6 extending coaxially through the internal chamber, outlet valve means 33 operable between the stem and the body at the outer end of the internal chamber so as to dispense fluid therefrom in an open condition of the valve and inlet valve means 21 operable between the body and the stem at the inner end of the internal chamber to admit fluid thereto in a closed condition of the valve wherein the inlet valve means comprises an annular seal portion 29 of the sleeve cooperating with an inner end portion 8 of the stem extending therethrough and wherein the sleeve further comprises an annular shoulder por

Abstract: A pump assembly (1) for an atomizing piston pump comprising a piston (16) slidably located in a cylinder (4), a variable volume fluid storage chamber (5) in communication with the cylinder on one side of the piston, means (18) for varying the volume of the chamber, resilient means (17) urging the varying means into a position corresponding to the minimum volume of the chamber, a fluid flow passageway (30, 31) through the piston, a resilient valve member (25) normally closing the passageway and deforming means (23) for deforming the valve member so as to open the passageway only after the piston has moved relative to the cylinder by a predetermined amount greater than zero. The pump assembly has application to dispensing metered doses of medicinal products and ensures that the dispensed dose is independent of finger pressure applied to the actuator.