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Bridge Circuits   Page 3
Bridge:   #'s-A     B-E    F-Z

Last Updated on:
Wednesday, December 20, 2017 05:03 AM

Circuits Designed by Dave Johnson, P.E. :
  • H Bridge Motor Controller uses Low Power -  This circuit uses a few logic gates & a 74AC240 to control power to a small gear motor… [Circuit by David A. Johnson P.E., 7/03/05]
     

  • Ideal Diode Function -  This circuit uses a low power op amp and a p-channel FET to form a diode function with a very low 0.05 volt voltage drop.  With the selected FET, the circuit can handle up to 2 amps of current.  Higher currents are possible with a FET with a lower channel… [Hobby Circuit designed by Dave Johnson P.E., 1/22/08]

  • Low Power H Bridge Motor Controller -  This circuit uses a few logic gates & a 74AC240 to control power to a small gear motor… [Hobby Circuit designed by David A. Johnson P.E., 7/03/05]
     

  • Low Voltage H-Bridge -  TTL type Q and inverted Q inputs control a classic H-bridge circuit, rated at 50 volts and about 10 amps.  The circuit can control power and direction of a DC motor… [Circuit by Dave Johnson P.E., 2/04/07]
     

  • Precision Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages… [Hobby Circuit designed by David A. Johnson P.E., 5/29/00]
     

  • Precision Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages.… [Hobby Circuit designed by Dave Johnson P.E., 5/29/00]



  • Safety Light -  My 1200 square foot metal shop only has one small entrance door and no skylights.  If the lights are turn off while inside, there is not enough light to safely find the door to exit the building.  On a couple occasions, while I was quietly working at my test bench, my wife would walk into the shop, grab a garden tool and rush back out, turning off the lights and closing the door without thinking… [Circuit by David A. Johnson P.E., 11/29/04]
     

  • Shop Safety Light -  My 1200 square foot metal shop only has one small entrance door and no skylights.  If the lights are turn off while inside, there is not enough light to safely find the door to exit the building.  On a couple occasions, while I was quietly working at my test bench, my wife would walk into the shop, grab a garden tool and rush back out, turning off the lights and closing the door without thinking… [Circuit by David A. Johnson P.E., 11/29/04]
     

  • Ten Second Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages… [Circuit by David A. Johnson P.E., 5/29/00]
     

  • Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages.… [Circuit by David A. Johnson P.E., 5/29/00]

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

Full-Bridge Amplification Using a Resistor Arrays to Provide Precise Matching in Excitation Amplifier -  This example provide excitation using resistor arrays to produce precise gain. The circuit is configured to provide 10V and –5V excitation to the bridge, producing a common mode voltage at the input to the LTC2430/LTC2431 of 2. 5V, maximizing the AC input range for applications where induced 60Hz could reach amplitudes up. . .  [Linear Technology App Note, Apr 29th 2010]

 

Full-Bridge Amplification Using a Single Amplifier -  This example shows a single amplifier being used to produce single-ended gain. This topology is best used in applications where the gain setting resistor can be made to match the temperature coefficient of the strain gauges. If the bridge is composed of precision resistors, with only one or two variable elements, the reference. . .  [Linear Technology App Note, Apr 29th 2010]

 

Full-Bridge Amplification Using Autozero Amplifiers to Reduce Input Referred Noise -  This circuit shows an example of a simple amplification scheme. This example produces a differential output with a common mode voltage of 2. 5V, as determined by the bridge. The use of a true three amplifier instrumentation amplifier is not necessary, as the LTC2430/LTC2431 have common mode rejection far beyond that of most. . .  [Linear Technology App Note, Apr 29th 2010]

 

Full-Bridge Load Current Monitor -  The LT1990 is a micropower precision difference amplifier with a very high common mode input voltage range. It has pin selectable gains of 1 or 10. The LT1990 operates over a ±250V common mode voltage range on a ±15V supply. The inputs are fault protected from common mode voltage transients up to ±350V and differential voltages. . .  [Linear Technology App Note, Apr 5th 2010]

 

Full-Bridge Quarter Brick DC/DC Converter Reference Design -  AN1369 - Technology Inc. . . .  [Microchip App Note last updated on 17-Apr-12]

 

Full-featured H-bridge -  This is a slightly revised version of the 6-transistor H-bridge designed by Mark Tilden and found on the BEAM Tek website (now only available via archive). I encourage anyone interested in H-bridges to read Mark's article, as it gives an excellent step-by-step explanation of how the bridge works. In particular, it discusses variations on the bridge, such as the positive-input and negative-input versions. The basic circuit is as Mark describes it. The changes are as follows. . . .  [Bruce Robinson]

 

Generate Boost Rails In A Bridge-Rectifier Circuit -  11/16/12 EDN Design Idea   Bridge ac inputs have the ability to sink and source current with reference to the bridge-rectifier outputs. Many single-voltage power supplies consist of a transformer, a rectifier, and a filter capacitor, as shown in Figure 1. This circuit is relatively inexpensive and easy to build but supplies only a single voltage. Circuits employing op amps, data converters, and other analog circuit blocks often require additional voltages to operate. These extra voltages can be either higher than the main supply voltage or negative. . . .  [by Horst Koelzow, Calgary, Alberta]

 

H Bridge Motor Control Circuits -  This page features H-Bridge circuits used for controlling direct current motors. Several designs are shown using both CMOS and Bi-Polar power devices. scroll to view all of the circuits. . . .  [from Rob Paisley's Model Train web site]

 

H Bridge Motor Controller uses Low Power -  This circuit uses a few logic gates & a 74AC240 to control power to a small gear motor . . . [Hobby Circuit designed by David A. Johnson P.E.,  07/03/05]

 

Half Bridge Motor Driver -  The LT1336 is a cost effective half-bridge N-channel power MOSFET driver. The floating driver can drive the topside N-channel power MOSFETs operating off a high voltage (HV) rail of up to 60V (absolute maximum). In PWM operation an on-chip switching regulator maintains charge in the bootstrap capacitor even when approaching. . .  [Linear Technology App Note, Apr 5th 2010]

 

H-Bridge Design -  With a Protection against Having Two Positive Input Pulses. . . .  [G.L. Chemelec, designer]

 

Low Power H Bridge Motor Controller -  This circuit uses a few logic gates & a 74AC240 to control power to a small gear motor . . . [Circuit by David Johnson P.E.,  07/03/05]

 

Low Voltage H-Bridge -  TTL type Q and inverted Q inputs control a classic H-bridge circuit, rated at 50 volts and about 10 amps. The circuit can control power and direction of a DC motor . . . [Circuit by Dave Johnson P.E.,  02/04/07]

 

Make A Bridge Rectifier from Diodes -  Make your own single or multi phase bridge rectifier from diodes. . . .  [REUK-Renewable Energy UK website]

 

Microcontroller drives H bridge to power a permanent-magnet DC motor -  03/15/07  EDN Design Idea   Improved H-bridge requires only two driver signals. . .  [by Luca Bruno, ITIS Hensemberger Monza, Lissone, Italy]

 

PIC16F84 TRIAC/IGBT Brightness Phase Controller -  . . .  [MicrochipC by Mike Pearce]

 

Programmable-gain amplifier is low-cost -  01/18/01 EDN Design Idea   Numerous programmablegain amplifiers are available, but a simple solution provides the option of using 256 gain steps with an 8-bit DAC and higher steps. PDF has several circuits, scroll down. . . .  [by J Jayapandian, Indira Gandhi Centre for Atomic Research, Kalpakkam, India]

 

RC Network Eliminates Precision Reference -  08/04/94 EDN Design Idea   The circuit in Fig 1 uses a magneto-resistive sensor to detect small magnet displacements without resorting to a precision voltage reference. A simple RC divider takes the place of the reference, eliminating an expensive component. . .  [by Christophe Basso, European Synchrotron Radiation Facility, Grenoble, France]

 

Resolve 0.1-Ff Change from 100 Pf -  01/06/00  EDN Design Idea   The circuit in Figure 1 can resolve 0. 1-fF changes in a 100-pF bridge element and can accommodate large-scale changes in the bridge without adjustment. You can use changes in capacitance to measure applied pressure, rotation, torque, liquid level, the wat. . .  [by Derek Redmayne]

 

Resolves 0.1-Ff Change from 100 Pf -  01/06/00  EDN Design Idea   The circuit in Figure 1 can resolve 0. 1-fF changes in a 100-pF bridge element and can accommodate large-scale changes in the bridge without adjustment. You can use changes in capacitance to measure applied pressure, rotation, torque, liquid level, the wat. . .  [by Derek Redmayne]

 

Sensor Bridge -  (spice design) . . .  [Rick (last name not given)]

 

Sensor Bridge with Current Bias -  (spice design) . . .  [Rick (last name not given)]

 

Soldering iron driver bridge controls temperature -  09/06/13   EDN Design Idea   With a power supply and a replacement soldering handle you can implement this temperature-controlled soldering iron driver. One way you can control the temperature of a soldering iron is with a microcontroller, using temperature feedback from the thermistor in the handle near the iron's tip. This Design Idea presents a soldering iron driver that does this using only analog components. . . .  [by Kiril Karagiozov]

 

Three Phase Bridge Rectifier -  Find out about three phase bridge rectifiers. . . .  [REUK-Renewable Energy UK website]

 

Wattmeter -  The extra input B is for a later SWR brigde project, also the TX serial output will be in use later. The uncalibrated signal response is: +1/-1 dB from 1MHz to 450MHz. Input SWR vill varry from 1. 00 to 1. 30, depending on input frequency. To make the SWR this good, you need to assemble the input circuit correct and adjust the capasitor. Input power range: -60 to +30dBm that is 1 nW to 1 Watt. . . . 

 

Z-bridge -  A Cheaper H-Bridge Design - the Zoelen Bridge (Z-Bridge) . . .  [A.A. van Zoelen's]


Bridge:   #'s-A     B-E    F-Z


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