Class 331/59 - CONVERTIBLE (E.G., OSCILLATOR TO AMPLIFIER, ETC.)

Subclass of Class 331 - Oscillators
Definition: Subject matter wherein means are provided for effecting
No. of patents: 29
Last issue date: 01/06/2009

Number	Title	Issue Date
7474160	Systems and methods for calibrating a filter Calibrating a filter is disclosed. The filter is reconfigured as an oscillator during calibration. Switches and/or other implementations of reconfiguring a filter are used to reconfigure the negative feedback loop of the filter to a positive feedback loop. The oscil...	01/06/2009
7403063	Apparatus and method for tuning center frequency of a filter A tuning method and a tuning apparatus for tuning a filter are disclosed. The tuning method includes: configuring the filter as a VCO; utilizing the VCO to generate an oscillation signal according to a driving signal; comparing a frequency of the oscillation signal ...	07/22/2008
7369895	Method for applying variable electro-muscle stimulation and system therefor A method for applying variable electro-muscle stimulation (EMS) to an exercising person includes a belt having a plurality of electrodes placed around the abdomen at the rectus abdominis and obliques. The person then gets into an exercise apparatus which has a rotat...	05/06/2008
7283009	Dual band voltage-controlled oscillator A resonance circuit is interposed between a base and a collector of an oscillating transistor and is configured such that a resonance frequency is switched in correspondence with two different frequency bands. A first feedback unit is interposed between the base and...	10/16/2007
7268634	Dual-mode voltage controlled oscillator using integrated variable inductors A novel form of an integrated variable inductor uses an on-chip transformer together with a variable capacitor. The variable capacitor can either be a varactor or a switched capacitor array and is connected to the secondary coil of the transformer. By changing the c...	09/11/2007
7196589	Apparatus and method for dual features of frequency setting and frequency synchronization in one pin An integrated circuit includes an oscillator circuit, where a frequency of an oscillator output signal provided by the oscillator circuit is adjustable by either coupling a resistor to an input pin, or by applying an external clock signal to the input pin. The oscil...	03/27/2007
7164388	Low cost adjustable RF resonator devices manufactured from conductive loaded resin-based materials Inductor-capacitor (LC) RF resonator circuits are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers i...	01/16/2007
7123109	Crystal oscillator with variable bias generator and variable loop filter An oscillator circuit may be operated in a high power mode or a reduced power mode. The high power mode provides fast start-up of the oscillator circuit. ...	10/17/2006
7088162	Circuit generating constant narrow-pulse-width bipolarity monocycles A mono-cycle generating circuit includes a multiplexer, a pulse generating circuit, and a buffer circuit. The multiplexer receives data of a logical 1 or a logical 0, determines whether to generate a positive mono-cycle or a negative mono-cycle, based upon the data,...	08/08/2006
6995625	Oscillator with quadrature output in a cross-coupled configuration An oscillator that provides a quadrature output and has a cross-coupled configuration is disclosed. The oscillator generates an output signal having a frequency. Two phase shift circuits, or stages, are activated by a control signal to provide phase shifts within th...	02/07/2006
6782485	Microcomputer operable with external and internal clock signals A microcomputer is provided, which eliminates the need of input of a selection signal to select whether an external oscillator element is connected to generate an internal clock signal or an external clock signal is inputted to generate an internal clock signal. In ...	08/24/2004
6462626	Quadrature output oscillator device A quadrature output oscillator device (22) includes a first voltage controlled oscillator (40) and a second voltage controlled oscillator (44). The second voltage controlled oscillator (44) generates a first output (C) and a second output (D) to drive a f...	10/08/2002
5982243	Oscillator selectively operable with a parallel tuned or a series tuned resonant circuit An electronic oscillator of the Colpitts type with an amplifying element and a tank circuit. The tank circuit includes a parallel tuned resonant circuit, a series tuned resonant circuit and a switching circuit that selectively connects one of the resonant...	11/09/1999
5900787	Dual-mode, crystal resonator/external clock, oscillator circuit An oscillator circuit, having an inverter with input and output terminals interconnected through a feedback resistance, operates in two modes. In a first mode, the input and output terminals are coupled to an external crystal resonator. In a second mode, ...	05/04/1999
5675294	Single pin crystal oscillator circuit A single pin integrated oscillator circuit includes an amplifier having a first input terminal to which an external crystal may be connected, and a second input terminal which receives a feedback path from an output terminal of the amplifier. An oscillato...	10/07/1997
5416445	Low power-consumption clock pulse generator with two clock sources selectively available A clock pulse generator has a three-state inverter and a transfer gate forming in combination a feedback loop for oscillating an output clock signal in cooperation with a quartz resonator in an internal oscillation mode, and the three-state inverter enter...	05/16/1995
5369377	Circuit for automatically detecting off-chip, crystal or on-chip, RC oscillator option A self-configurable clock circuit which automatically detects at power up whether an off-chip crystal oscillator is connected to an integrated circuit including the self-configurable clock circuit, and following such detection generates a system clock sig...	11/29/1994
5311150	Convertible oscillator circuit An integrated oscillator includes an amplifier having first and second voltage inputs, and first and second current outputs, and a current mirror having an input coupled to the second current output of the amplifier and an output coupled to the first curr...	05/10/1994
5151613	Large scale integrated circuit device for switching oscillation circuit An integrated circuit device having a CR oscillation circuit and a crystal oscillation circuit and capable of selecting either the CR oscillation circuit or the crystal oscillation circuit, includes a unit for receiving an electrical signal, and a unit fo...	09/29/1992
5093633	Externally trimmed integrated-circuit RC oscillator A circuit has a mask option for choosing between a crystal or an RC oscillator. The RC oscillator is completely fabricated on an integrated-circuit chip and includes a charging path, a discharging path, and a capacitor coupled at a node. The alternating c...	03/03/1992
5088107	Linear channel bandwidth calibration circuit A calibration circuit for a linear channel of an optical modem includes circuitry interconnected to the linear channel for causing the linear channel to oscillate. Circuitry is interconnected to the output of the linear channel for monitoring the bandwidt...	02/11/1992
4864639	Self-test device and method having an amplifier converted into an oscillator An FM receiver is self tested by connecting a positive feedback network in circuit with a wideband, front end r.f. amplifier of the receiver, so that the amplifier is converted into an oscillator. R.f. and i.f. characteristics of the receiver are determin...	09/05/1989
4613829	Switchable oscillator circuit An oscillator circuit operable in different modes. The oscillator circuit, when operated as a crystal oscillator, is initially operated as a standard inverter oscillator requiring a low start-up voltage. Once the circuit oscillates, an hysteresis feedback...	09/23/1986
4370625	Integrated circuit having elements for selectively forming an RC or a crystal oscillator In a microcomputer integrated circuit the option of selecting between an RC oscillator or a crystal oscillator for generating the clock for the microprocessor is made available. By making the selection during the manufacturing process, external pin outs a...	01/25/1983
4190808	Amplifier-oscillator frequency multiplier apparatus An amplifier-oscillator frequency multiplier apparatus utilizing a pair of servo-connected amplifiers which are electronically switchable to provide either a coherent amplifier or a non-coherent oscillator....	02/26/1980
4064462	Acoustic feedback peak elimination unit This invention is an acoustic feedback peak elimination unit and has as its objective the elimination of unwanted acoustic resonance peaks, also called ring modes, inherent in an enclosed region where a sound amplifying system may be used. A number of sep...	12/20/1977
4056787	Self-oscillating mixer circuit A self-oscillating mixer circuit suitable for a television receiver is provided using characteristically a single or two switching diodes. During VHF receiving, the mixer circuit operates in a self-oscillating mixing mode under an optimum bias condition, ...	11/01/1977
4044317	Crystal controlled square wave oscillator A crystal controlled square wave oscillator requiring a minimum number of components, exhibiting high frequency stability, and operating at substantially a 50% duty cycle. A quartz crystal dual monolithic resonator is provided having a pair of signal elec...	08/23/1977
4001732	Calibration oscillators for noise reduction systems In a signal compressor wherein an amplified and smoothed control signal is employed to control a variable gain or variable impedance device, a switch is provided to connect a positive feedback loop across the control signal amplifier, thereby to place the...	01/04/1977

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Class 331/59 - CONVERTIBLE (E.G., OSCILLATOR TO AMPLIFIER, ETC.)