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High Frequency Amplifier / High Speed Circuits / Wide Band Amplifier Circuits
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Amplifier -- Main Page
 

Last Updated: November 30, 2017 07:37 AM

Circuits Designed by Dave Johnson, P.E. :
Tester for Brown Out Voltage  -  Using a cheap 24vac transformer, this circuit can test a product under low 95vac conditions.    With the components show, it has a rating of 250 watts max.   . . . Circuit by Dave Johnson P.E.-July 11, 2006

Wide Band Zero Cross Detector  -  This circuit was designed to convert a low amplitude 40KHz signal into a clean square wave signal.  It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak.  The input frequency can range from a few kilohertz to about 150 . . . Circuit by Dave Johnson P.E.-July 18, 2000


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

TBA120 Narrowband FM Receiver -  Here is a nice little receiver for narrow-band FM reception.  It can also be used to receive FSK, RTTY and PACKET signals from the HF bands.  Basic receiver sensitivity is in the region of 1uV PD and the receiver can be tuned to almost any frequency from 100KHz up to probably 120MHz.  Ok then, here is the circuit diagram __ Designed by Harry Lythall-SM0VPO

Temperature-to-Frequency Converter -  Precision oscillator structure uses SCR effect to discharge integration capacitor.  A temperature dependent device (LM134) effects the integrator trip point to form a variable interval.  An output transistor detects the reset action and forms a logic pulse. __ Linear Technology/Analog Devices App Note, Jun 21, 2011

Tester for Brown Out Voltage -  Using a cheap 24vac transformer, this circuit can test a product under low 95vac conditions.    With the components show, it has a rating of 250 watts max.. . . Circuit by Dave Johnson P.E.-July, 2006

Three Channel, Single Supply Video Line Driver (AC Coupled) -  The LT6553 ultra-high-speed triple video driver configured for single-supply AC-coupled operation.  This part is ideal for HD or high-resolution workstation applications that demand high bandwidth and fast settling.  The amplifier gains are factory-set to two by internal resistors __ Linear Technology/Analog Devices App Note, Mar 25th 2010

Triple Video Line Driver (DC Coupled) -  In DC-coupled systems, the video swings are fixed in relation to the supplies used, so back-terminated cable drivers need only provide 2V of output range when optimally biased.  In most cases, this permits operation on lower power supply potential (s) than with AC-coupling (unclamped mode).  Generally DC-coupled circuits use split __ Linear Technology/Analog Devices App Note, Mar 25th 2010

Two Terminal Current Regulator (LT1635) -  The LT1635 combines an op amp with a 200mV reference.  Scaling this reference voltage to a potential across resistor R3 forces a controlled amount of current to flow from the +terminal to the –terminal.  Power is taken from the loop. __ Linear Technology/Analog Devices App Note, Mar 31, 2010

UltraLow Noise, 2.4GHz Gain Bandwidth Large-Area Photodiode Amplifier -  The combination of the ultralow noise JFET gain stage and the LT1806 low noise amplifier achieves the ultralow input noise performance.  The circuit’s input voltage noise was measured at 0.95nV/rtHz. __ Linear Technology/Analog Devices App Note, Mar 22, 2010

Ultrapure 1kHz Sine Wave Generator -  A lamp provides amplitude stability while the very low noise amplifier creates a pure sine wave signal.  The R an C values set the oscillator frequency and the feedback resistor sets the lamp current and output amplitude. __ Linear Technology/Analog Devices App Note, Jun 21, 2011

Using All four Amplifiers of the LT1397 to Drive Large zCapacitive Loads -  Four paralleled amplifiers increase load capacitor current drive capability.  A small ballast resistor at each output increases isolates the effects of each amplifier's different output offset. __ Linear Technology/Analog Devices App Note, Jun 29th 2012

Very Low Noise Large Area Photodiode Amplifier -  Large area photodiodes come with a large capacitance, typically on the order of 3000pF or larger.  This capacitance to ground at the input of a transimpedance amplifier has a significant effect on the output noise of the circuit as the noise gain increases dramatically at higher frequencies.  AC coupling a bootstrap JFET across __ Linear Technology/Analog Devices App Note, Mar 16th 2010

Wide Band RF Amplifier for 10MHz-500MHz Input -  This paper describes an RF amplifier circuit which is suitable for the frequencies between 10MHz and 500MHz.  These kind of amplifiers are called wide band amplifiers. __ Designed by Yilmaz Kalafat, PE1PYJ

Wide Band Zero Cross Detector -  This circuit was designed to convert a low amplitude 40KHz signal into a clean square wave signal.  It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak.  The input frequency can range from a few kilohertz to about 150. . . Circuit by Dave Johnson P.E.-February, 2006

Wide Bandwidth Photodiode Amplifier -  Wide bandwidth performance from a small photodiode requires minimizing the total input capacitance.  In this circuit the amplifier's differential input capacitance is bootstrapped by the feedback with R1 and R2.  Choosing the amplifier input that is at the corner of the package for the dual LTC6244 also minimizes pin-to-pin capacitance. __ Linear Technology/Analog Devices App Note, Mar 16th 2010

Wideband AGC has 60-dB dynamic input rang -  10/10/96 EDN-Design Ideas  Automatic-gain-control(AGC] circuits serve in many applications to maintain signals at fixed levels.  However, in applications such as digital-receiver circuits and back-channel modems, the function of the AGC often aims more at increasing dynamic input range through the controlled application of both gain and attenuation.  In this type of application, the AGC is usually upstream of a high-speed ADC.  The __ Circuit Design by Carl Dickey, National Semiconductor, Comlinear Division

Wideband Low Noise Amplifier Drives 50 Ohm Loads -  10/23/97 EDN-Design Ideas  The circuit in Figure 1 is a wideband, high-gain amplifier with two useful features not often found in combination  The input-referred noise is 2.6 nV/(square root Hz], yet it can deliver 27 dBm into a double-terminated 50 ohm load or 30 dBm into a single-terminated load.  The circuit uses two monolithic op amps __ Circuit Design by Mitchell Lee, Linear Technology Corp, Milpitas, CA

Wideband Oxygen Sensor Controller Mk.2, Pt.1 -  Accurately measure air/fuel ratios with an improved oxygen sensor __ SiliconChip

Wideband Oxygen Sensor Controller Mk.2, Pt.2 -  Last month, we introduced our new Wideband Oxygen Sensor Controller Mk.2 and described the circuit.  This month, we give the circuit for the display unit and the full construction details. __ SiliconChip

Wideband peak Detector operates over wide input-frequency range -  11/22/07 EDN-Design Ideas An ultrafast comparator and associated circuitry enable peak detection over a wide input-frequency and -voltage range __ Circuit Design by Jim McLucas, Longmont, CO

Wideband Receiver -  The LTC5551 is a 2.5V to 3.6V mixer optimized for RF downconverting mixer applications that require very high dynamic range.  The LTC5551 covers the 300MHz to 3.5GHz RF Frequency range with LO frequency range of 200MHz to 3.5GHz.  The LTC5551 provides very high IIP3 and P1dB with low power consumption.  A typical application is __ Linear Technology/Analog Devices App Note, Sep 19th 2013

Wideband VHF/UHF/SHF 22dB RF preamp with MAR-6 or MAR-8 (MSA-0885) -  The MAR6 (MSA-0686, 0685, 0885) is a high performance silicon bipolar Monolithic Microwave Integrated Circuit (MMIC) housed in a low cost, surface mount plastic package. 
This MMIC is designed for use as a general purpose 50 W gain block.  Applications include narrow and broad band IF and RF amplifiers in commercial and industrial applications. __ Designed by Guy Roels ON6MU

Wideband, High Input Impedance, Gain = 1000 Amplifi er -  The gain is distributed equally between four amplifier sections in cascade, so the gain of each section is about 5.6.  Distributing the gain uniformly provides the best bandwidth.  Trimming of the final stage corrects for resistor variances so that overall gain is 1000x. __ Linear Technology/Analog Devices App Note, Jun 21, 2011

YPBPR to RGB Converter -  In this realization of a component video (YPBPR) to RGB adapter, amplifier count is minimized by performing passive arithmetic at the outputs, but this requires higher gains, thus a higher supply potential is needed for this (for at least the positive rail).  One small drawback to this otherwise compact solution is that the __ Linear Technology/Analog Devices App Note, Mar 25th 2010


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