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| Number | Title | Issue Date |
| 7898354 | Pulse generation circuit and modulator It is an object of the invention to provide a pulse generation circuit and a modulator for realizing a high On/Off ratio in a small circuit scale and with lower power consumption. A short pulse generation circuit according to the invention includes an oscillator ... | 03/01/2011 |
| 7786818 | Electronic component comprising a modulator An electronic component includes an RFID transponder, and also a security document comprises such an electronic component. The electronic component has a modulator for modulating a carrier signal, the modulator being constructed from at least two organic field effec... | 08/31/2010 |
| 7327184 | Low-power multi-level pulse amplitude modulation driver and semiconductor device having the driver A low-power multi-level pulse amplitude modulation (PAM) driver, and a semiconductor device having the same, in which the multi (M)-level PAM driver includes a load unit, first and second current sources, a pair of first input transistors, a pair of second input tra... | 02/05/2008 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7283013 | Contactless IC card system In a contactless IC card system, a modulating circuit manufactured in an IC form is operable at a high power efficiency. The demodulating apparatus is configured to include: first signal output means for outputting a first output signal having a predetermined phase ... | 10/16/2007 |
| 7274266 | Radio frequency excitation arrangement A method is performed for influencing the signal shape of an output signal of an RF power resonance amplifier and an RF excitation arrangement including an RF power resonance amplifier. A basic signal of a basic frequency is amplified and modulated with a modulation... | 09/25/2007 |
| 7269212 | Low-latency equalization in multi-level, multi-line communication systems Low-latency equalization mechanisms for multi-PAM communication systems are disclosed that reduce delay and complexity in signal correction mechanisms. The equalization mechanisms tap into input signals for a multi-PAM signal driver, and compensate for attenuation a... | 09/11/2007 |
| 7205796 | AND circuit An AND circuit is provided, which has a first differential pair including a first transistor and a second transistor, to which a first input differential signal is inputted, a second differential pair including a third transistor and a fourth transistor, to which a ... | 04/17/2007 |
| 7124221 | Low latency multi-level communication interface A memory system uses multiple pulse amplitude modulation (multi-PAM) output drivers and receivers to send and receive multi-PAM sigsnals. A multi-PAM signal has more than two voltage levels, with each data interval now transmitting a “symbol” at one of the valid... | 10/17/2006 |
| 7119773 | Apparatus and method for controlling gray level for display panel An apparatus and method for controlling a gray level for a display panel driven by a plurality of scan line signals and a plurality of data line signals is characterized in that some bits of the respective data are pulse amplitude modulated and the other bits are pu... | 10/10/2006 |
| 7093145 | Method and apparatus for calibrating a multi-level current mode driver having a plurality of source calibration signals A current controller for a multi-level current mode driver. The current controller includes a multi-level voltage reference and at least one source calibration signal. A comparator is coupled by a coupling network to the multi-level voltage reference and the at leas... | 08/15/2006 |
| 6965262 | Method and apparatus for receiving high speed signals with low latency An apparatus and method for receiving high-speed signals having a wide common-mode range with low input-to-output latency. In one embodiment, the receiver includes an integrator to accumulate charge in accordance with an input signal during an integration time inter... | 11/15/2005 |
| 6617938 | Return to zero and sampling pulse generating circuits and method for direct digital up conversion Direct up-conversion of a signal is accomplished using a sampling pulse generator circuit and a gated differential amplifier, enabled by the sampling signal. When not enabled, the output of the differential amplifier is pulled to zero. The sampling pulse ... | 09/09/2003 |
| 6292067 | Ask modulator and communication device using the same An ASK modulator can be operated with only a positive-voltage power source. A source-voltage switching circuit that applies a positive voltage to the source of a FET when a data signal is at an L level in relation to the source of the FET is connected to ... | 09/18/2001 |
| 6198361 | Contactless IC card system In a contactless IC card system, a modulating circuit manufactured in an IC form is operable at a high power efficiency. The demodulating apparatus is configured to include first signal output means for outputting a first output signal having a predetermi... | 03/06/2001 |
| 5969579 | ECL pulse amplitude modulated encoder driver circuit A Pulse Amplitude Modulation (PAM) generator that generates multilevel PAM signals at frequencies over 1 GHz is disclosed. The PAM generator uses Emitter Coupled Logic (ECL) technology that implements differential pair current switches such that the outpu... | 10/19/1999 |
| 5351149 | ASK optical transmitter An amplitude-shift-keyed (ASK) optical transmitter is described for generating an ASK modulated infrared signal from a light-emitting-diode (LED). The transmitter includes a DC powered microcircuit for generating an ASK modulation signal. A pair of mosfet... | 09/27/1994 |
| 5097229 | Modulator - demodulator transformer coupled D.C. to one Mhz information channel An analog direct current to one MHz information channel is provided, with high acccuracy and 10K volt input-output isolation. The information channel has a voltage to current converter which receives the analog input signal, and whose output is modulated ... | 03/17/1992 |
| 4602223 | High rate modulator/demodulator for digital signals amplitude modulated on digital data A modulator circuit produces an AM modulated output signal by modulating a low rate digital signal on a higher rate data signal. The modulator circuit operates to switch the ground return of a line driver circuit which selectively amplifies the high rate ... | 07/22/1986 |
| 4529950 | Digital phase and amplitude modulator A digital phase and amplitude modulator with a code conversion circuit having several digital inputs able to receive digital data and the same number of outputs supplying code converted digital data, a generator of at least one carrier having at least one... | 07/16/1985 |
| 4510466 | Switched capacitor SSB modulator An integrated single-sideband modulator comprises six integrated capacitors C1-C6 and first switch means alternately connecting C1 and C2 as feedback capacitors across a differential input operational amplifier A1. The amplifier has a virtual ground poten... | 04/09/1985 |
| 4510467 | Switched capacitor DSB modulator/demodulator An integrated single-sideband modulator comprises six integrated capacitors C1-C6 and first switch means alternately connecting C1 and C2 as feedback capacitors across a differential input operational amplifier A1. The amplifier has a virtual ground poten... | 04/09/1985 |
| 4507626 | Switched capacitor SSB modulator An integrated single-sideband modulator comprises six integrated capacitors C1-C6 and first switch means alternately connecting C1 and C2 as feedback capacitors across a differential input operational amplifier A1. The amplifier has a virtual ground poten... | 03/26/1985 |
| 4507625 | Switched capacitor AM modulator/demodulator A first embodiment of an integrable switched capacitor modulator comprises a differential input operational amplifier A1 having a virtual ground potential impressed on its inverting input terminal; capacitors C1, C2 and C3; and switch means operative for ... | 03/26/1985 |
| 4504804 | Switched capacitor balanced modulator/demodulator An integrated single-sideband modulator comprises six integrated capacitors C1-C6 and first switch means alternately connecting C1 and C2 as feedback capacitors across a differential input operational amplifier A1. The amplifier has a virtual ground poten... | 03/12/1985 |
| 4504803 | Switched capacitor AM modulator/demodulator A first embodiment of an integrable switched capacitor modulator comprises a differential input operational amplifier A1 having a virtual ground potential impressed on its inverting input terminal; capacitors C1, C2 and C3; and switch means operative for ... | 03/12/1985 |
| 4490689 | Balanced modulator using logic gates for DSBSC output A balanced modulator, producing a double sideband suppressed carrier (DSBSC) output achieves carrier suppression and linear performance suitable to modulate frequency division multiplexed signals with stringent interchannel interference requirements. It i... | 12/25/1984 |
| 4338580 | Self balancing amplitude modulator A modulator receiving an analog input signal and a switching signal for providing an amplitude modulated output signal. The modulator includes a differential input amplifier coupled to a multiplier wherein the analog input signal is commutated through a l... | 07/06/1982 |
| 4310810 | Modulator systems The modulator system comprises emitter follower type first and second transistor pairs with their emitter electrodes commonly connected, and an emitter follower type third transistor pair with their emitter electrodes commonly connected. Clamped modulatio... | 01/12/1982 |
| 4278954 | Suppressed carrier modulator using differential amplifier The modulation system comprises emitter coupled first to fourth transistor pairs of one type, emitter coupled fifth and sixth transistor pairs of the other type, and a differential amplifier. The first and second transistor pairs are connected to the fift... | 07/14/1981 |
| 4180785 | Modulator for forming the product of two input signals A modulator suitable for amplitude modulation includes first and second converters for converting the positive and negative excursions of first and second input signals into four respective signals of one polarity which are passed through a multiplying de... | 12/25/1979 |
| 3995178 | Pulse-width and frequency modulator circuit A very accurate, low-offset switching circuit is provided. The switching circuit is used in a modulator which permits output pulses to be modulated in width and/or frequency. The reversible output signals of the switching circuit are added to the modulati... | 11/30/1976 |
