Class 330/148 - PLURAL SIGNAL OUTPUTS

Subclass of Class 330 - Amplifiers
Definition: Subject matter wherein at least two separate signal output
No. of patents: 36
Last issue date: 11/01/2011

Number	Title	Issue Date
8049559	Semiconductor device, radio frequency circuit, and radio frequency power amplifier A semiconductor device and a radio frequency circuit which are appropriate for multiband, multimode performance can be realized as a semiconductor device including a field-effect transistor formed on a semiconductor substrate, and include: ohmic electrodes serving a...	11/01/2011
7403069	Trifferential amplifier and trifferential amplifier system A multi-fferential amplifier system includes an amplifier having a plurality of amplifier inputs and a plurality of amplifier outputs; a plurality of input terminals for receiving a plurality of inputs and being interconnected with the amplifier inputs through a plu...	07/22/2008
7400193	Ultra wide band, differential input/output, high frequency active splitter in an integrated circuit A wideband splitter includes a core amplifier for receiving a single pair of differential input signals and providing first and second pairs of differential output signals. The first pair of differential output signals and the second pair of differential outputs hav...	07/15/2008
7224221	Power amplification apparatus, and mobile communication terminal apparatus A power amplification apparatus includes, between a first amplification element for amplifying an input signal and a first output terminal, a second amplification element for further amplifying the input signal amplified in the first amplification element to output ...	05/29/2007
7126414	Arrangement and method for controlling an amplifier circuit corresponding to energy uptake in the amplifier circuit An amplifier circuit (1) is disclosed, wherein with a view to reducing the leakage power of the amplifier circuit (1) a current path (6) is provided between a first output terminal (A1) and a second output terminal (A2) of the ampl...	10/24/2006
7113033	Variable impedance load for a variable gain radio frequency amplifier A variable impedance load (104) is provided at the output of a radio frequency (RF) driver amplifier (102) having a variable gain. In an exemplary embodiment, the variable load (104) comprises a resistor (R) in series with a semiconductor device...	09/26/2006
6967531	Multi-output amplifier with isolation between outputs An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate an intermediate signal in response to an input signal. The second circuit may be configured to generate a plurality of output signals in response to the int...	11/22/2005
6054902	High-frequency amplifier A high-frequency amplifier that can reduce the size, weight and price of a device that contains this high-frequency amplifier. The high-frequency amplifier has, for example, an input matching circuit of the low-pass type and an input matching circuit of t...	04/25/2000
5945880	Low noise amplifier An amplifier, suitable for radio frequency applications, has good noise properties because of a special transistor configuration. A pair of transistors is connected in a cascode configuration, to overcome the Miller effect. The transistors have their base...	08/31/1999
5767756	Active quadrature power splitter An active quadrature power splitter having low power consumption is small in size and is inexpensive, for obtaining two output signals of which the phase difference is 90 degrees. Since the active quadrature power splitter operates as a microwave amplifie...	06/16/1998
5699013	Tri-state audio differential driver First and second amplifiers are coupled together to provide complementary output signals at respective output terminals in response to application of operating potentials to first and second supply terminals of each amplifier and application of an input s...	12/16/1997
5691670	Integrated microwave-silicon component The circuit employs two bipolar transistors, five resistors and a capacitor and can be primarily utilized as a broadband pre-amplifier and also as an oscillator or a mixer. A first transistor is connected to the circuit input and ground. A second transist...	11/25/1997
5668494	Circuit and method for driving alternatively electric loads with low impedance An electronic driver circuit for low-impedance loads, being of a type which comprises an input terminal (IN) to which a voltage signal (Vin) is applied for alternate transfer to an output, and a plurality of output terminals (OUTi), each connected to a co...	09/16/1997
5586114	Multiplexing instrumentation preamplifier An oscilloscope preamplifier includes N inputs and Z outputs. A programmable cross-point multiplexer provides a first operating mode in which each of N inputs is connected to a different output thereby providing a preamplifier with Z channels, a second op...	12/17/1996
5543759	Audio amplification circuits An audio amplification circuit includes a ganged pair of logarithmic potentiometers, each potentiometer of the pair having an input terminal, an output terminal, and a wiper terminal. The input terminals of each potentiometer are adapted for connection to...	08/06/1996
5399986	Isolated multi-output power amplifier A multi-output power amplifier is disclosed. The amplifier is divided into two stages. A single voltage amplifier is used as an input amplifying stage and several current amplifiers are used as a second amplifying stage. The inputs to the current amplifie...	03/21/1995
5361038	Active load applications for distributed circuits An active load applied to the gate transmission line termination of distributed power devices reduces the low frequency noise power appearing at the output of the device. The active load, including at least one active device such as a field effect transis...	11/01/1994
5349303	Electrical charge transfer apparatus A charge transfer circuit includes an input terminal for receiving an input electrical charge, a transconductance amplifier having first and second inputs including an inverting input, and first and second differential current outputs, and a multiple outp...	09/20/1994
5304950	Low power, low noise preamplifier with offset voltage cancellation Apparatus and methods are disclosed for providing a low power, low noise preamplifier, especially useful with a Forward Looking Infrared (FLIR) sensor array. Utilizing a differential amplifier, where one half of the differential pair is shared among a plu...	04/19/1994
5216378	Switch adaptable radio frequency amplifier A radio frequency variable gain amplifier (204) has a plurality of outputs. The amplifier (204) includes a transistor amplifier (330) having a plurality of switchable fixed gain states for amplifying an oscillator signal. The amplifier (204) includes a bi...	06/01/1993
5177449	Radio frequency amplifier circuit A radio frequency amplifier comprises a differential amplifier having a pair of differential first and second transistors and a first and a second load resistor; an emitter grounded amplifier having a third transistor and a third load resistor; and a refe...	01/05/1993
5166640	Two dimensional distributed amplifier having multiple phase shifted outputs A two dimensional distributed amplifier phase shifter having a distributed reference amplifier circuit generating a reference signal, the reference amplifier circuit having its input connected to one end of a plurality of serially connected microstrip tra...	11/24/1992
5130669	Apparatus for driving a mechanical resonator from a high impedance source The present invention concerns a high impedance signal source driving a relatively low input impedance mechanical resonating device such as a ceramic filter having an input impedance which varies with frequency. The high impedance source is further loaded...	07/14/1992
5077801	Foreground music system using current amplification A foreground music sound system includes at least one complementary array of speakers (12) comprising a bass frequency speaker (20) and a plurality of microspeackers (14-18). The complementary speaker array may be designed to provide full frequency respon...	12/31/1991
5072199	Broadband N-way active power splitter A power splitter (10), including a feedback amplifier (16) and matching network (18), is disclosed for splitting the output of a signal source (12) to be applied to a processing system (14). The feedback amplifier includes a gain stage (20) and active loa...	12/10/1991
5070305	Device for converting unbalanced analog electric signals into fully differential signals An all-differential operational amplifier (20) has a first input (22) and a second input (24) and correspondingly has a first output (26) and a second output (28), fed back on its own input respectively through a first (34) and second (36) impedance which...	12/03/1991
5034698	Dual-path wideband and precision data acquisition system A dual path amplifier circuit configuration to obtain wideband and precision DC response includes a wideband voltage amplifier, an input termination, a virtual ground feedback amplifier, and a compensated attenuator. The circuit allows precision DC and wi...	07/23/1991
4775842	Multi-output feedback amplifier A feedback amplifier for providing an amplified signal to first and second utilization networks includes first and second feedback paths. The amplifier output is coupled via a first coupling resistor to a first terminal to which the first utilization netw...	10/04/1988
4683441	Apparatus for establishing the differences between multiple pairs of analog input signals A bank of differential amplifier circuits includes specialized circuits to provide multi-channel differencing with a minimum number of active devices such that the differences between pairs of analog input signals, such as available from patient monitorin...	07/28/1987
4562405	Multiplexed buffer A buffer is described which includes two gain stages which may be constructed of MOS devices, the first stage having a low noise characteristic and the second stage having a high current drive capability. The second stage is switched in circuit only when ...	12/31/1985
4536716	Stereo amplifier circuit for bichannel signals A stereo amplifier circuit which comprises a first circuit responsive to a first input signal and to a second input signal for generating a first output signal which corresponds to the potential difference between the first and second input signals, a sec...	08/20/1985
4535298	Driver circuit The present invention relates to a driver circuit for use in connecting a source of RF drive voltage to a power amplifier stage. The driver is comprised of a transformer having a center tap, a first terminal connected to a first branch of the transformer ...	08/13/1985
4223272	Four-terminal network of adjustable transfer function A four-terminal network selectively convertible into a low-pass, high-pass, band-pass, all-pass or band-stop filter comprises three cascaded stages each including an operational amplifier with a grounded noninverting input, the amplifiers of the first two...	09/16/1980
4198607	Input circuit for a measuring amplifier device A measuring amplifier device is provided with an input circuit producing different functions of an input signal in order to permit output signals in different measuring ranges to be produced. The circuit can be constituted by an operational amplifier havi...	04/15/1980
4177432	Multi output differential amplifier Disclosed is a differential amplifier having a pair of input terminals and multiple output terminals. Various ones of the output terminals are selectively enabled in response to output selection signals. Within the amplifier is a first transistorized circ...	12/04/1979
3983486	Modular CATV system A CATV system is described wherein distribution cables are provided with amplifying means spaced at uniform intervals therealong. The amplifiers are provided with an input tap and two output taps, the first of which provides the usual gain to provide an o...	09/28/1976

PatentStorm

Quotables

PatentStorm News

Class 330/148 - PLURAL SIGNAL OUTPUTS