Class 332/146 - Including discrete semiconductor device

Subclass of Class 332 - Modulators
Definition: Subject matter containing an electrical device whose constituent
No. of patents: 31
Last issue date: 03/13/2012

Number	Title	Issue Date
8134421	Voltage control oscillator and quadrature modulator A voltage control oscillator includes: first and second field effect transistors, a drain of one of which is connected to a gate of the other and a drain of the other of which is connected to a gate of the one; third and fourth field effect transistors, a drain of o...	03/13/2012
7750751	Method and apparatus for creating phase modulation in edge-sensitive signals Disclosed herein is a method and apparatus used to add high-performance phase modulation to an applied input signal with data or clock edges which overcomes limitations of range, bandwidth and operating data rate by utilizing parallel devices to singularly modulate ...	07/06/2010
7409012	Modulator and signaling method Phase shift key modulators (100, 500, 1000, 1400, 1700) are provided in which a multiphase signal source (108, 1402, 1406-1412,1702) is used to generate a plurality of phases of a carrier signal. A selector (110) is used to select one pha...	08/05/2008
7127129	Method and apparatus for phase shifting an optical beam in an optical device An apparatus and method for high speed phase modulation of optical beam with reduced optical loss. In one embodiment, an apparatus includes a first region of an optical waveguide disposed in semiconductor material. The first region has a first conductivity type. The...	10/24/2006
7023292	Polar modulation using amplitude modulated quadrature signals Polar modulators include a phase splitter, a controller, variable current sources, transistor circuits, and a combiner. The phase splitter splits a RF carrier signal into quadrature component signals that are 90 degrees out of phase with each other. The controller g...	04/04/2006
6531935	Vector modulator An analogue phase shifter with vector modulator is envisioned. The analogue phase shifter has an input stage that provides the generation of a pseudo-basis of four vectors. The analogue phase shifter has a multiphase filter. The analogue phase shifter has...	03/11/2003
6242990	Quadrature phase shift keyed/bi-phase shift keyed modulator A phase modulator for communication applications is constructed in so as to be easily implemented by way of MMIC technology. A phase modulator section is followed by a saturated amplifier section so as to provide substantially constant amplitude for all b...	06/05/2001
6208216	Phase-locked-loop pulse-width modulation system A phase-locked loop applied as a phase modulator using an external analog control signal whereby a single-ended pulse-width modulated digital signal may be derived from the phase detector output, and two phase modulated square-wave digital signals may be ...	03/27/2001
5949297	Balanced modulator A balanced modulator has a pair of diodes, a plurality of line patterns including a balance-to-unbalance converter, the line patterns including lines extending toward and connected to the diodes, respectively, and at least a set of capacitive stubs dispos...	09/07/1999
5939918	Electronic phase shifter An electronic phase shifter splits an input signal into two signals whose amplitudes are set by a weighting circuit controlled by a phase shift control signal. Each of the two outputs of the weighting circuit is loaded with an RLC resonator, one tuned to ...	08/17/1999
5844449	Gilbert cell phase modulator having two outputs combined in a balun A phase modulator having a Gilbert cell mixer can be used in frequency ranges from a microwave frequency band of several GHz to a millimeter wave band of several 10 GHz. Two output signals Vout1, Vout2 from the Gilbert cell mixer are supplied to balanced ...	12/01/1998
5811830	Quantum well optical waveguide phase shifter The present invention is achieved by layering a dielectric slab between a ground plane and a two dimensional quasi quantum well heterostructure and by switching between an unbiased state and a negative potential which is established between the quantum we...	09/22/1998
5717364	Mixer A small and inexpensive mixer that does not require a choke inductor and a large-capacitance capacitor. The mixer has a FET. The FET's source is grounded via a capacitor and is also connected to a power-supply terminal. The FET's gate is coupled to a bias...	02/10/1998
5680417	Method and apparatus for providing biphase modulation A binary phase shift keyed (BPSK) modulator (200) used for digital phase modulation is shown. Phase shift is achieved by electrically switching an RF input signal (201) through either a direct signal path (203) or through a half wave transmission signal p...	10/21/1997
5574409	Apparatus and method for adjusting microwave BPSK modulator and mixer Microwave two-phase modulator and mixer each comprising a balance/unbalance transformer section to which a microwave signal is applied; a synthetic/branching line section which is connected to the both ends of the balancing line of the balance/unbalance t...	11/12/1996
5515014	Interface between SAW filter and Gilbert cell mixer The invention concerns multipliers used to modulate a carrier by a signal. The signal is delivered by a Surface Acoustic Wave (SAW) filter, which requires a load impedance of low value, in the range of tens of ohms, and almost certainly less than 200 ohms...	05/07/1996
5457436	Balanced phase modulator used in microwave band A phase modulator for a microwave band having a desirable modulation characteristic by maintaining the impedance thereof constant, includes two PIN diodes 2 and 3 connected to a merchant balun 1 and a bias circuit 18 which supplies bias voltages to the PI...	10/10/1995
5453720	Digital adjustable phase modulator and method A digital adjustable phase modulator and method includes a first circuit path and a second circuit path for a signal. A fixed bias voltage is coupled to the first circuit path and to the second circuit path which respectively include first and second acti...	09/26/1995
5442327	MMIC tunable biphase modulator An apparatus for providing electronically tunable biphase modulation including an input and a first switch having a first output, a second output and a first input coupled to the input. The first switch couples the first input to either the first output o...	08/15/1995
5410279	Balanced type phase modulator for use in microwave band There is provided a phase modulator having a low signal loss characteristic and a simple circuitry configuration, comprising a phase modulating circuit and a linearizer connected thereto, wherein the phase modulating circuit includes a transformer to whic...	04/25/1995
5317288	Continuously variable electronically controlled phase shift circuit A variable electronically controlled phase shift circuit including a phase splitter stage including a 90 degree phase divider to split an RF input signal into 0 and 90 degree components. Each split signal is further split into two pairs that are displaced...	05/31/1994
5126698	Phase modulator operated in saturation and with small angle modulation An input carrier signal is applied to two paths. The two paths are such that the phase difference between the output of the two paths is substantially 90°. At least one of the two paths responds to a modulating signal to select the polarity of the phase ...	06/30/1992
4932038	Phase modulator circuit A phase modulator circuit includes a pair of similar long-tailed pair transistor amplifiers (TR11, TR12 and TR13, TR14) to which sinusoidal signals are fed. The transistor pairs form the collection loads of a further long tailed pair (TR21, TR22) fed with...	06/05/1990
4549152	Broadband adjustable phase modulation circuit A phase modulation circuit to provide at an output terminal an output signal controllably shifted from 0° to 360° relative to an input signal provided at an input terminal includes a first 90° coupler connected between the input terminal and second and...	10/22/1985
4503405	Frequency modulation using a phase modulator A frequency modulator circuit arrangement, comprising a phase modulator (1) having a carrier signal input (2) which is fed from a carrier signal generator (18) and a modulation signal input (3) which is fed from a modulation signal input terminal (6) via ...	03/05/1985
4263531	Electron beam-semiconductor diode hybrid device for phase control Method and means for controlling the phase of an output signal comprising an electron beam device having traveling-wave-type deflection plates to which an input signal is fed, means controlling the velocity or position of the electron beam and p-n semicon...	04/21/1981
4216542	Method and apparatus for quadriphase-shift-key and linear phase modulation A submultiple (30Fl) of an S-band transmitter output frequency (240Fl) is divided equally between a linear phase modulation branch and a QPSK modulation branch. The linear modulation branch includes a multiplier (X7) to increase the carrier frequency to a...	08/05/1980
4095196	Arc-cosine phase modulators Arc-cosine phase modulation is achieved by transforming the baseband signal with a tanh-1 transformation function, by modulating a carrier signal with a quadrature sum of two exponential signals related to the inverse hyperbolic tangent signal,...	06/13/1978
4091342	Time delay modulator A time delay modulator is disclosed in which the instantaneous time base of a carrier signal is varied in accordance with a modulating signal. In one embodiment, modulation is achieved through the use of charge transfer delay lines and variable frequency ...	05/23/1978
4059814	Controllable semiconductor element Controllable semiconductor element with an active semiconductor path controlled by means of conductivity modulation. The structure corresponds to a semiconductor arrangement with applied conductive strips. On the lower side of a semiconductor layer (1), a meta...	11/22/1977
3997848	Linear phase demodulator including a phase locked loop with auxiliary feedback loop A phase modulated wave that may have no carrier power is demodulated by a phase locked loop including a phase detector for deriving an A.C. data output signal having a magnitude and a phase indicative of the phase of the modulated wave. A feedback loop re...	12/14/1976

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Class 332/146 - Including discrete semiconductor device