Abstract: A transconductance-capacitance filter having a plurality of transconductors, that operates in a normal operation mode and a testing/tuning operation mode. During the normal operation mode, the transconductors operate as having normal transconductances. During the testing/tuning operation mode, the transconductances are scaled by a same amount, so that frequencies of the test signals provided are lower than in the normal operation mode, and so that transfer characteristics of the filter can be easily verified.

Abstract: A switched capacitor circuit includes an operational transconductance amplifier, a feedback stage having a first switched capacitor and a first time constant, and a load stage having a second switched capacitor and a second time constant. The first time constant and the second time constant are equal to each other to improve settling of the circuit. The first and second switched capacitors are coupled to an output of the operational transconductance amplifier via transistors. The transistors are sized so that the time constants of the feedback and load section are equal. In a further embodiment, the time constant of the feedback section is made greater than the load section, to further improve settling. On-state resistance of the transistors are controlled with respect to transconductance of the operational transconductance amplifier to maintain smaller error.

Abstract: An amplifier is provided The amplifier includes an input voltage-to-current converter, a programmable input current divider, a current follower, a feedback voltage-to-current converter, and a programmable feedback current divider. The input voltage-to-current converter receives an input voltage and provides upper and lower input currents. The input current divider receives a first bias voltage and the upper and lower input currents, scales the upper and lower input currents, and provides upper and lower scaled input currents. The current follower receives the upper and lower scaled input currents, and provides upper and lower output currents and an output voltage. The feedback voltage-to-current converter receives the output voltage and provides upper and lower feedback currents. And the feedback current divider receives a second bias voltage and the upper and lower feedback currents, scales the upper and lower feedback currents, and provides upper and lower scaled feedback currents to the current follower.

Abstract: A cascode transconductor circuit controls the transconductance of a differential stage with an active load followed by a cascode or folded-cascode current follower in discrete steps. The circuit includes a transconductor receiving first and second input voltages, and outputting first and second internal currents, a first resistive divider receiving the first internal current at a digitally-selected first node, and generating a third internal current at a third node, a second resistive divider receiving the second internal current at a digitally-selected second node, and generating a fourth internal current at a fourth node, and a cascode circuit receiving the third and fourth internal currents and supplying first and second output currents.

Abstract: A method and resulting structure for fabricating interconnects through an integrated circuit. The method includes adding more power lines 80, 100, 151 and/or increasing the width of power lines 120 and/or adding a power bus 140 near regions of high current flow. The resulting structure also provides more metallization near regions of high current flow. Similar to the method, the resulting structure may include additional power lines 80, 100, 151 and/or wider power lines 120 and/or a power bus 140 to increase the amount of metallization. An improved routing technique is also provided. Such routing technique includes providing an initial Ucs value and then adding additional lines near high current regions to decrease the Ucs value.

Abstract: An improved stirrer for being positioned in a toner cartridge or developer hopper of an electrophotographic printer is disclosed. The toner cartridge or developer hopper is a container having toner disposed therein for being supplied from the container to the printer. The container has first and second longitudinal ends, a generally curved interior wall extending therebetween, and a longitudinal axis. The stirrer has a rotatable driven member, first and second stirring arms, and a bridge member. The rotatable driven member is disposed adjacent the first end of the container, and has an axis of rotation generally parallel to the longitudinal axis of the container. The first and second stirring arms are rotatably fixed to the driven member and extend within the container longitudinally from the driven member.

Abstract: The present invention discovery of a printer having a particular printer type in a network is disclosed. A socket having a socket identifier (ID)) associated with the printer type is provided to allow communication between the network and the printer. In a socket poll mode, the socket awaits and obtains outgoing data from the network tagged with the socket ID and sends the obtained outgoing data to the printer. In a socket listen mode, the socket awaits and obtains incoming data from the printer and sends the obtained incoming data to the network. A printer information object is provided for storing printer information associated with the printer once the printer is discovered. A timer provides a periodic timing signal TICK. The printer is periodically polled once every N TICKs.

Abstract: An application specific integrated circuit (ASIC) including a phase-locked loop (PLL) circuit operably coupled to an internal clock and an external clock. The present PLL circuit includes an internal phase detector circuit, an internal charge pump operably coupled to the phase detector circuit, a loop filter operably coupled to the charge pump, and an internal programmable voltage-controlled oscillator 200, 300. The internal programmable voltage controlled oscillator includes a plurality of delay elements, which have a respective switch to turn-on the delay elements. A storage device having a plurality of outputs providing selected switch signals to the voltage oscillator program one of a plurality of center frequencies. Each of the outputs is operably coupled respectively to the delay elements through the respective switch. The switch isolates a first group of delay elements from a second group of delay elements.

Abstract: A method and resulting structure for fabricating interconnects through an integrated circuit. The method includes adding more power lines 80, 100, 151 and/or increasing the width of power lines 120 and/or adding a power bus 140 near regions of high current flow. The resulting structure also provides more metallization near regions of high current flow. Similar to the method, the resulting structure may include additional power lines 80, 100, 151 and/or wider power lines 120 and/or a power bus 140 to increase the amount of metallization. An improved routing technique is also provided. Such routing technique includes providing an initial Ucs value and then adding additional lines near high current regions to decrease the Ucs value.

Abstract: A computer network has a printing device with an associated print server and print queue, each having a designated name. A user selects the printing device to be configured, and it is determined whether the user wishes to create a new print server name to be associated with the printing device. If the user wishes to do so, the user inputs a unique print server name. If the user does not wish to do so, the user selects a print server name from a compiled list of existing print server names. Thereafter, it is determined whether the user wishes to create a new print queue name to be associated with the print server name and the printing device. If the user wishes to create a new print queue name, a default print queue name is created and it is determined whether the user wishes to accept the created print queue name. If the user does not wish to accept the created print queue name, the user inputs a unique print queue name.

Abstract: A band printer having a transport mechanism, an endless photoreceptive image carrying ribbon, a latent toner imaging apparatus, a transfer mechanism, and a fixing mechanism is disclosed. The transport mechanism defines a printing medium path extending in a first direction and transports a printing medium along the printing medium path. The endless photoreceptive image carrying ribbon circulates adjacent the printing medium path in a second direction at an angle to the first direction, and the latent toner imaging apparatus is adjacent to and stationary with respect to the circulating ribbon. The imaging apparatus forms an electrostatic latent toner image on the surface of the ribbon according to received image data as the ribbon moves past the imaging apparatus, and the transfer mechanism transfers the formed toner image to the printing medium when the formed toner image is aligned with the printing medium. Thereafter, the fixing mechanism fixes the image to the printing medium.

Abstract: A host based printing system for printing a page of a document is disclosed. The system has a rasterized-image printing device for printing the page and a computer having a multi-tasking operating system. The computer includes an interface to the printing device, system memory, a resident computer application operated to produce system graphics resources data, a rasterizer rasterizing the data to produce bitmap data, a bitmap driver providing the rasterizer with printing device parameters, and a printing device interface (PDI). The PDI has a database, a print controller, and a port handler. The database has a page record for the page and a document record for the document, and the page record is updated when the page is output-ready. The print controller communicates with the database to determine whether a page is output-ready and locks at least a portion of the output-ready data for the page into physical memory.

Abstract: A data transmission system transmits data from a first device to an interface device at a continuous rate and includes a first device for storing data and for transmitting data at a first data output rate. An interface device outputs data at a second data output rate different from the first data output rate. A preload buffer initially receives a predetermined amount of data from the first device and stores the initially received data. The preload buffer also transmits at least a portion of the initially received data at a third data output rate. The preload buffer receives additional data from the first device as the initially received data is transmitted from the preload buffer. A first buffer and a second buffer of generally equal size are sized to receive a single block of data from the preload buffer. The size of the single block of data is less than the predetermined amount of output data initially received and stored in the preload buffer.

Abstract: A multifunctional document processing system receives document signals from a local or a remote device and processes the document signals utilizing a host computer for transmission to the local or remote device. The system has a multifunctional local peripheral device which includes a scanner for optically scanning document information, for converting the scanned document information into electrical document signals and for transmitting the document signals to the host computer. The multifunctional local peripheral device also includes a recording device, such as a printer for receiving document signals from the host computer and for producing a recorded form of the document information, such as a printed document based on the received document signals.

Abstract: A multifunctional document processing system for faxing, copying, printing or scanning document information and for transmitting and receiving document signals to and from a remote device. The system comprises a multifunctional local device which includes a scanner for optically scanning document information, for converting the scanned document information into electrical document signals and for transmitting the document signals to the processor. The multifunctional local device also includes a recording device, such as a printer for receiving document signals from the processor and for producing a recorded form of the document information, such as a printed document based on the received document signals. A control module is interfaced between the processor and the multifunctional local device for receiving document signals from the multifunctional local device and from the remote device and for sending the received documents signals to the processor.

Abstract: An interface system for a printer and a print font chip includes an I/O port which is integral with the printer and receives from the printer address bits, data bits and control logic. A memory bus is electrically connected to the I/O port. The memory bus transmits and receives address bits, data bits and control logic from the I/O port. At least one print font chip is capable of generating address bits, data bits and control logic. Interfacing circuitry interfaces the memory bus and at least one font chip. The interfacing circuitry is bidirectional and capable of transmitting address bits, data bits and control logic between the bus and the font chip. Bus arbitration circuitry accesses the memory bus by at least one font chip. The arbitration circuitry is characterized in terms of priority. The font chips are assigned a predetermined priority by which access to the memory bus is determined.

Abstract: An apparatus and method is provided for the support of an accessory unit within the defined space of a storage area. The storage area is preferably a floor-mounted console receptacle or a dashboard receptacle commonly found within the seating compartment of an automobile. The support structure provides a mounting plate that supports a radio telephone unit within the receptacle by spanning the space separating side walls of the receptacle. Engaging Velcro attachment elements mounted upon both side flanges of the mounting plate and the receptacle side walls permits the mounting plate supporting the radio telephone unit to be easily installed or removed within the receptacle. The use of Velcro elements to removably install the mounting plate within the receptacle eliminates the need for fastening screws, nuts and bolts, or rivets to mount a support structure within the storage area.

Abstract: An apparatus and method is provided for the support of an accessory unit within the defined space of a storage area. The storage area is preferably a floor-mounted console receptacle or a dashboard receptacle commonly found within the seating compartment of an automobile. The support structure provides a mounting plate that supports a radio telephone unit within the receptacle by spanning the space separating side walls of the receptacle. Engaging Velcro attachment elements mounted upon both side flanges of the mounting plate and the receptacle side walls permits the mounting plate supporting the radio telephone unit to be easily installed to removed within the receptacle. The use of Velcro elements to removably install the mounting plate within the receptacle eliminates the need for fastening screws, nuts and bolts, or rivets to mount a support structure within the storage area.

Abstract: A method of improving the grayscale resolution of a bi-level, light emitting diode type page printer includes increasing the frequency at which printing data is entered into an LED head and correspondingly increasing the frequency at which the LEDs are actuated. The rate at which an image drum is moved past the LEDs is decreased and the feed rate of paper flowing through the printer is correspondingly decreased. The duration of each actuation of the LEDs is decreased to produce dots on the image drum and on the paper which are of a small size.

Abstract: A control module controls the operation of a multifunctional peripheral device. A control bus receives data from at least one auxiliary device associated with the control module. A control processor processes the received data. A control memory stores the received data. A video interface converts the received data into video data signals which are transmitted to the multifunctional peripheral device.