High Frequency / High Speed
Wide Band Circuits
Build an adjustable high frequency notch filter: 02/06/03
EDN-Design Ideas / Although you can obtain universal,
resistor-programmable switched-capacitor filters that are
configurable as notch filters, most cannot operate at bandwidths
higher than 100 kHz. Further, the typically 16
Composite Amp Provides High Gain & Bandwidth: 04/28/94 EDN-Design
Composite Amplifier Boosts Precision Of Programmable Voltage
Source : 07/08/02 Electronic Design - Ideas for Design /
Engineers often need dc voltage sources with very high precision
and good resistive and/or capacitive load-driving capability for
industrial applications. However, precision benchtop power
supplies can be very expensive if high accuracy also is...
HF Signal Generator:
Wideband AGC has 60 DB Dynamic Input Range: 10/10/96 EDN-Design
Wideband Filter Only Has Two Different Components : 01/21/02
Electronic Design - Ideas for Design / Wideband filters with
bandwidths in excess of an octave can be created by cascading a
high-pass filter and a low-pass filter. In this design idea,
nine-pole high-pass and low-pass filters have been constructed
using a modified equal-element design.
Wideband Filter uses image Parameters: 10/26/00 EDN-Design
Ideas / PDF contains multiple circuits - scroll to find this
Wideband OpAmp Capable of MicroPower Operation : National
Semiconductor Application Notes,24-Oct-2001
Wideband, Low Noise Amplifier Drives 50 Ohm Loads: 10/23/97
BROAD BAND 5MHz OPTICAL FIBER RECEIVER
This circuit is a simple broad band
light detector that uses a very inexpensive IC and a PIN
photodiode that is packaged for use with plastic optical fibers.
It has a bandwidth from 1KHz to over 5MHz. It is great for
experimenting with various modulated light sources.
BROAD BAND 2MHz OPTICAL FIBER RECEIVER
If you need more
sensitivity than the above circuit this circuit provides about
ten times more gain. It too is designed around an inexpensive
plastic optical fiber detector.
20MHz VCSEL 3mW LASER TEST CIRCUIT (20mhzlsr)
This circuit takes advantage of some new vertical cavity surface
emitting lasers (VCSEL) that don’t require light output control
circuits. The circuit shows how to drive the device from a
single high speed CMOS IC. The circuit can easily be modified to
transmit signals from kilohertz to about 50MHz.
10MHz TO 20MHz LASER LIGHT DETECTOR (20mrvr2)
This circuit was originally designed to detect laser light
pulses for an optical Ethernet communications system. It has
good ambient light immunity.
N-CH AND P-CH TRANSISTORS FORM PUSH-PULL DRIVER (pushpul)
This circuit can produce high
speed output signals with fast rise and full times. The unique
change pump action allows the voltage of the upper P-ch device
to range from millivolts to hundreds of volts. The output
current is only limited by the rating of the transistors. I have
used this circuit beyond 2MHz.
FET INPUT HIGH SPEED LIGHT DETECTOR (fetamp0)
This circuit is
yet another design that converts current from a PIN photo diode
to a voltage. It has a bandwidth that extends beyond 50MHz.
C-MOS INVERTER MAKES LOW POWER AMP (invertamp1)
With the addition of one resistor and a capacitor, some common
logic ICs can be transformed from digital to analog duties.
This circuit outlines some the features to expect from different
WIDE BAND ZERO CROSS DETECTOR (zerocross1)
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