Amplifier Ics
Amplifier Ics
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 Maxon AD 9 Pro Analog Delay Pedal  US $337.50
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 Maxon 9 Series AD 9 Pro Analog Delay Pedal FREE WORLDWIDE SHIPPING US $337.50
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 1piecesSANYO STK350 030 POWER AMPLIFIER US $12.99
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 Maxon AD 9 Pro Analog Delay US $259.00
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 50PCS NS LM1458N LM1458 GP OP AMP IC CHIPS US $24.80
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 10PCS HT8950 Voice Modulator for Audio Amplifier ICs US $24.99
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 4LM308N LM308 OP AMP IC For Guitar Effect Pedal US $7.55
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 30pcs TL072 TL072CP chorus delay OP Amplifier CHIPSIC US $8.80
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 10pcs NE5534N Dual Low Noise OP Amplifier IC US $12.45
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 2PCS HT8950 Voice Modulator for Audio Amplifier ICs US $6.90
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 1TDA7388 4X 41W Quad Bridge Car Radio Amplifier IC NEW US $6.50
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 50pcs LM391N 100 Power Audio Amplifier IC Driver ICS US $126.00
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 Maxon AD999 Vintage Series Analog Delay Pedal BRAND NEW US $229.00
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 12pcs LM391N 100 Power Audio Amplifier IC Driver ICS US $29.98
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 25pcs AD8620 SMT Dual Op Amp ICS IC CHIP NEW US $118.00
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 100pcs AD8620 SMT Dual Op Amp ICS IC CHIP NEW US $460.00
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 3pcs x BA6110 BA 6110 CHIPS ICs MICROCHIPS US $2.99
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 AD8620 SMT Dual Op Amp ICS IC CHIP NEW US $9.99
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 4pcs LM391N 100 Power Audio Amplifier IC Driver ICS US $21.90
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 PKG 500 RC4558P 4558P Operation Amplifier Chips ICS US $184.00
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 PKG 200 RC4558P 4558P Operation Amplifier Chips ICS US $76.80
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 Maxon PAC 9 Pure Stereo Analog Chorus NEW US $281.25
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 20pcsLM386N LM386 Audio Power AMPLIFIER DIP 8 IC US $8.90
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 8pcs HI FI Audio Amplifier IC TDA1514 TDA1514A ICs US $33.99
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 20pcs HI FI Audio Amplifier IC TDA1514 TDA1514A ICs US $68.00
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 15PCS BA6110 OP Amplifier IC ICS CHIP US $11.99
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 2PCS TDA7560 RADIO AMPLIFIER IC NEW US $13.99
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 Maxon Analog Delay AD 9 PRO Guitar Pedal US $337.00
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 1p CA3080A 3080A Operational Transconductance Amps OTA US $7.98
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 2pcs LM391N 100 Power Audio Amplifier IC Driver ICS US $11.50
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 2pcs AD8620 SMT Dual Op Amp ICS IC CHIP NEW US $12.55
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 10pcs AD8620 SMT Dual Op Amp ICS IC CHIP NEW US $49.99
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 10 CA3080H 3080H Operational Transconductance Amps OTA US $88.00
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 10CA3080A 3080A Operational Transconductance Amps OTA US $63.00
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 100BB OPA2604AP OPA2604 Audio Operational Amplifier IC US $228.00
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 200TL022CP TL022 Audio AMP IC ICS DIP 8 NEW US $275.00
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 ELECTRO HARMONIX DELUXE MEMORY BOY DELAY EFFECTS PEDAL US $186.00
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 15pcsTDA1519C TDA1519 Power Radio Amplifier IC CHIPs US $54.99
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 4pcsTDA1519C TDA1519 Power Radio Amplifier IC CHIPs US $19.88
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 Maxon AD 999 Analog Delay Pedal NEW Auth Dealer with FREE CABLE US $337.50
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 CA3080H 3080H Operational Transconductance Amps OTA US $11.99
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 2 Audio Power Amplifier w Mute IC LM3886 LM3886T US $14.90
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 5 Audio Power Amplifier w Mute IC LM3886 LM3886T NEW US $34.99
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 PACK of 10 BA6110 OP AMPS CHIPS ICs ICS US $8.90
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 MAXON AD 999 PRO VINTAGE SERIES ANALOG DELAY FREE WORLDWIDE SHIPPING US $399.99
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 Maxon 9 Series AD 9 Pro Analog Delay Pedal US $337.50
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 10pcs TL072 TL072CP chorus delay OP Amplifier CHIPSIC US $3.38
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 10PSC TA75558P OP AMPS ICs FOR IBANEZ TS9 TS808 MODS US $26.80
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 New Maxon AD999 Vintage Series Analog Delay US $337.50
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 Maxon AD 999 Vintage Series Analog Delay NEW FREE ship US $337.50
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 Maxon 9 Series AD 9 Pro Analog Delay Pedal Standard US $337.50
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 1977 COPICAT SUPER IC MODEL WEM US $539.40
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 VINTAGE Maxon AD 9 Analog Delay Guitar Pedal Made in Japan US $64.99
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 100TL022CP TL022 Audio AMP IC ICS DIP 8 NEW US $155.00
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Simple wireless RF IC solutions with sub-GHz radio
To build an advanced wireless system, most developers will end up choosing between two industrial, scientific and medical (ISM) radio band options—2.4GHz or sub-GHz wireless RF. Pairing one or the other with the system's highest priorities will provide the best combination of wireless performance and economy.
These priorities can include:
• Range
• Power consumption
• Data rates
• Antenna size
• Interoperability (standards)
• Worldwide deployment
Wi-Fi®, Bluetooth® and ZigBee® technologies are heavily marketed 2.4GHz protocols used extensively in today's markets. However, for low-data-rate applications, such as home security/automation and smart metering, sub-GHz wireless systems offer several advantages, including longer range, reduced power consumption and lower deployment and operating costs.
Sub-GHz radios
Sub-GHz radios can offer relatively simple wireless solutions that can operate uninterrupted on battery power alone for up to 20 years. Notable advantages over 2.4GHz radios include:
Range— The narrowband operation of a sub-GHz radio enables transmission ranges of a kilometer or more. This allows sub-GHz nodes to communicate directly with a distant hub without hopping from node to node, as is often required using a much shorter-range 2.4GHz solution. There are three primary reasons for sub-GHz superior range performance over 2.4GHz applications:
1. As radio waves pass through walls and other obstacles, the signal weakens. Attenuation rates increase at higher frequencies, therefore the 2.4GHz signal weakens faster than a sub-GHz signal.
2. 2.4GHz radio waves also fade more quickly than sub-GHz waves as they reflect off dense surfaces. In highly congested environments, the 2.4GHz transmission can weaken rapidly, which adversely affects signal quality.
3. Even though radio waves travel in a straight line, they do bend when they hit a solid edge (like the corner of a building). As frequencies decrease the angle of diffraction increases, allowing sub-GHz signals to bend farther around an obstacle, reducing the blocking effect.
The Friis Equation demonstrates the superior propagation characteristics of a sub-GHz radio, showing that path loss at 2.4GHz is 8.5dB higher than at 900MHz.
Path Loss = 20*log10 [(4*pie*d)/wavelength] {dB}
This translates into 2.67x longer range for a 900MHz radio since range approximately doubles with every 6dB increase in power. To match the range of a 900MHz radio, a 2.4GHz solution would need greater than 8.5dB additional power.
Low interference— The airways are crowded with colliding 2.4GHz signals from various sources, such as home and office Wi-Fi hubs, Bluetooth-enabled computer and cell phone peripherals and microwave ovens. This traffic jam of 2.4GHz signals creates a lot of interference. Sub-GHz ISM bands are mostly used for proprietary low-duty-cycle links and are not as likely to interfere with each other. The quieter spectrum means easier transmissions and fewer retries, which is more efficient and saves battery power.
Low power— Both power efficiency and system range are functions of the receiver sensitivity plus the transmission frequency. The sensitivity is inversely proportional to channel bandwidth, so a narrower bandwidth creates higher receiver sensitivity and allows efficient operation at lower transmission rates.
For example, at 300MHz, if the transmitter and receiver crystal errors (XTAL inaccuracies) are both 10 ppm (parts per million), the error is 3kHz for each. For the application to efficiently transmit and receive, the minimum channel bandwidth is two times the error rate, or 6kHz, which is ideal for narrowband applications. The same scenario at 2.4GHz requires a minimum channel bandwidth of 48kHz, which wastes bandwidth for narrowband applications and requires substantially more operating power.
In general, all radio circuits running at higher frequencies, including low-noise amplifier, power amplifier, mixer and synthesizer, need more current to achieve the same performance as lower frequencies.
Range, low interference and low power consumption are basic advantages of sub-GHz transceiver applications over 2.4GHz apps. One of the disadvantages often cited is that the antennas are larger than those used in 2.4GHz networks. The optimal antenna size for 433MHz applications, for instance, can be up to seven inches. However, antenna size and frequency are inversely proportional. If node size is an important design consideration, developers can raise the frequency (up to 950MHz) in order to employ a smaller antenna.
About the Author
Silicon Labs - The Si4010 RF transmitter with 8051 microcontroller is the industry's first single chip remote control IC requiring only one external bypass capacitor, a printed circuit board, battery and an external casing with push buttons to form a complete remote control.
Do Receiver Vacuum Tubes attenuate, do any?
I was told that if you equate a vacuum tube to a transistor cathode = collector, grid = base, plate = emitter. Transmitter vacuum tubes apparently amplify, but do receiver tubes attenuate? If not do any vacuum tubes attenuate a signal? What would be the design for this? I have been doing experiments trying to build amplifiers with a 6CL6 and a 6CM7 tube, I am now working on an attenuation device. Any electronics buffs know how to make an attenuator out of ICs like an LM318? You mail email me.
An attenuator, in this case, is really just an amplifier with a gain of less than one. There are uses for this type of circuit.
The op amp is easier to work with-no filaments to worry about. The gain of of an op-amp circuit is always controlled with a few external resistors to provide feedback. The classic circuit is an inverting circuit has two resistors-one from the output to the (-) op amp terminal (call this one Rf). The other resistor also connects to the (-) op amp terminal (call this one Rs). Your input signal is fed into the other end of Rs. The (+) op amp teminal connects to ground.
The voltage gain of this circuit is Rf / Rs . If Rf is 10k ohms and Rs is 1K, the gain will be ten.
Switch these resistors and the gain will be 1k/10k = 0.1 .
Attentuation!
Google "Negative Feedback Op Amps". These are classic circuits.
Lecture - 15 IC Operational Voltage Amplifier