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Near-field Acoustical Holography: The Frame Drum
Near-field Acoustical Holography: The Frame Drum

TPS65950/30/20 32 KHz Oscillator Schematic and PCB Layout
TPS65950/30/20 32 KHz Oscillator Schematic and PCB Layout

... obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the speci ...
Regulating Pulse Width Modulator
Regulating Pulse Width Modulator

... Microsemi makes no warranty, representation, or guarantee regarding the information contained herein or the suitability of its products and services for any particular purpose, nor does Microsemi assume any liability whatsoever arising out of the application or use of any product or circuit. The pro ...
ICS252 - Integrated Device Technology
ICS252 - Integrated Device Technology

... 3) To minimize EMI, the 33Ω series termination resistor (if needed) should be placed close to the clock output. 4) An optimum layout is one with all components on the same side of the board, minimizing vias through other signal layers. Other signal traces should be routed away from the ICS252. This ...
vfpwm control
vfpwm control

... (b) Adapting PWM controller for VFPWM operation. in turn limits the minimum output voltage from a converter, can be increased if the switching frequency is appropriately reduced when the converter is required to operate with lower duty-cycles. A wide variety of PWM controllers are commercially avail ...
L2AB-Fall06
L2AB-Fall06

Command value signal card
Command value signal card

... (channel 2), the command value signal card usually controls a proportional amplifier. ...
Predicting Op Amp Slew Rate Limited Response
Predicting Op Amp Slew Rate Limited Response

... applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright ...
ANTENNA AMPLIFIER 88-108MHz - Electrical and Information
ANTENNA AMPLIFIER 88-108MHz - Electrical and Information

Headline 8-bit MCUs in 28-pin packages with enhanced NXP 80C51-based
Headline 8-bit MCUs in 28-pin packages with enhanced NXP 80C51-based

... 4 Industrial products 4 Battery-powered devices to white goods These 8-bit microcontrollers use an accelerated architecture that executes instructions in two to four clocks, delivering performance that is six times higher than that of a standard 80C51 device. The LPC9351 adds new and enhanced feat ...
1. Safety Precautions
1. Safety Precautions

... • Close the clamp completely before taking measurements. Errors can occur If any foreign objects or particles become trapped between the jaws. • Only perform measurements on conductors in which the current is flowing in only one direction. The device cannot correctly measure earth-shielded conductor ...
MAX1470EVKIT.pdf
MAX1470EVKIT.pdf

... BER), while a 433.92MHz kit displays a sensitivity of about -114dBm (1% BER). Note: The above sensitivity values are given in terms of average carrier power. If true pulse modulation is used instead of AM, then the sensitivity measurement is in terms of peak power, and as a result is reduced by 6dB. ...
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... the MEG Experiment at PSI, Switzerland. This experiment searches for the lepton-flavor violating decay +  e+ with a sensitivity down to 10-13. After a first prototype (DRS1), the second prototype (DRS2) has been fabricated in a 0.25 m CMOS process and successfully been tested. It contains 10 cha ...
Monitoring technique
Monitoring technique

... The unit EP 5966 controls the system and includes the common alarm output for all connected extension modules EP 5967. For audible alarm as well as for common alarm 2 relay outputs (NO) are available. The acknowledgement (QH and QS), as well as the lamp test (LT) can be effected through built in and ...
GR 614-C Selective Amplifier, Manual
GR 614-C Selective Amplifier, Manual

7154/7156 Variable Speed Drives
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... motor, slip is the difference between the rotating magnetic field in the stator and the actual rotor speed. When a magnetic field passes through the rotor's conductors, the rotor takes on magnetic fields of its own. These induced rotor magnetic fields will try to catch up to the rotating fields of t ...
LDO PSRR Measurement Simplified
LDO PSRR Measurement Simplified

... Figure 4. PSRR Measured With Recommended Method The THS3120 is suitable for measuring PSRR up to VDC = 5V, Frequency = 10MHz and Iload = 400mA. ...
RF2514 VHF/UHF TRANSMITTER Features
RF2514 VHF/UHF TRANSMITTER Features

... The charge pump consists of two transistors, one for charging the loop filter and the other for discharging the loop filter. The charge pump inputs are the outputs of the phase detector flip-flops. If both amplifier inputs are low, then the amplifier pair goes into a high impedance state, maintainin ...
The Time-Resolved Fluorescence Techniques
The Time-Resolved Fluorescence Techniques

... Another major disadvantage of EO modulators is that they require collimated light. With arc lamps the light transmittance is less then 5% and this is before any monochromators or filters! The phase shift instrumentation becomes much more complex when the picosecond lifetime range is required. In ord ...
tremolux-tremolo.pdf
tremolux-tremolo.pdf

Mathematical Analysis of Acoustic Guitar Notes
Mathematical Analysis of Acoustic Guitar Notes

... a mathematical model for synthesis of Guitar notes. Key-Words: - Mathematical model, acoustic guitar, plucking, picking, octave multiplier,LMD, frequency analysis string includes tension and mass per unit length of the string. These physical parameters influence fundamental tone of string vibration. ...
Audio preamplifier vvith no t.i.d. - Keith
Audio preamplifier vvith no t.i.d. - Keith

... optimizing the number of stages is associated with having sufficiently linear transistors of optimal frequency properties, gain, noise and other characteristics. Designers of ...
GCB-3424-L2x(D)
GCB-3424-L2x(D)

ORION english manual (word)
ORION english manual (word)

... the high quality receiver. While the visual bargraph display may only show a very small response, which may be interpreted as noise, the audible tone provides unquestionable detection of a Non-Linear Junction. Using an FM modulated tone can provide a tremendous increases in detection range if the re ...
TA5302 Owner`s Manual Doc.indd
TA5302 Owner`s Manual Doc.indd

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Heterodyne



Heterodyning is a radio signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden, in which new frequencies are created by combining or mixing two frequencies. Heterodyning is used to shift one frequency range into another, new one, and is also involved in the processes of modulation and demodulation. The two frequencies are combined in a nonlinear signal-processing device such as a vacuum tube, transistor, or diode, usually called a mixer. In the most common application, two signals at frequencies f1 and f2 are mixed, creating two new signals, one at the sum f1 + f2 of the two frequencies, and the other at the difference f1 − f2. These new frequencies are called heterodynes. Typically only one of the new frequencies is desired, and the other signal is filtered out of the output of the mixer. Heterodynes are related to the phenomenon of ""beats"" in acoustics.A major application of the heterodyne process is in the superheterodyne radio receiver circuit, which is used in virtually all modern radio receivers.
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