|
Easy Method Calculates Comparator Trip Points: 06/10/99
EDN-Design Ideas / (added 2/06) |
|
Electronic Fuse Emulates Fast or Slow BLow Fuses:
11/09/00 EDN-Design Ideas / (added 7/03) The electronic-fuse circuit in Figure 1 combines the properties of a current transducer and a
solid-state relay to disconnect low power at preset levels. Using this circuit lets you avoid the bother of stocking and replacing fusible
links. The circu... |
|
Expanded Scale Indicator Revisited: 08/08/02 EDN Design
Ideas / (added 1/05) The visualization aid that a previous Design Idea describes allows only the expansion of the upper end
of the scale (Reference 1). But what can you do if, according to your project requirements, you need to expand the middle region of the scale?
Figure 1a illustrates the challenge. A voltmeter comprises a 100-µA dc meter and a series resistor.... |
|
Fast Voltage Comparators with Low Input Current: National Semiconductor
Application Note (app note added 2/06) |
|
Filter Allows Comparison of Noisy Signals: 02/06/03 EDN
Design Ideas / (added 1/05) When you need to compare the dc level of a noisy signal with a reference for further processing,
the output of the comparator changes in a chaotic way when the dc level approaches that of the reference. You have a choice of two classic
solutions to this problem: One is to add hysteresis to the comparator, but, if the noise level is high, the hysteresis must be correspondingly
high.... |
|
Frequency Comparator Draws 8 µA: 03/03/97 EDN-Design Ideas / (added 5/03) |
|
Frequency Comparator has Status Output: 12/26/02 EDN
Design Ideas / (added 1/05) The original application for the circuit in Figure 1 was to check the number of revolutions of
an engine with only one LED as an indicator. The measurement of the number of revolutions usually involves sensors with a frequency output
proportional to the number of revolutions. The circuit compares the frequency output of such a sensor with a lower and upper limit and gives a
visual result, usi...... |
|
Frequency Comparer Produces Binary Results : 09/29/94 EDN Design Ideas / (added 11/05) |
|
Frequency Window Comparator has Hysteresis: 11/07/96 EDN-Design Ideas / (added 7/03) The frequency comparator in Figure
1 uses two VCOs. C1, R1+R2, and the voltage at pin 9 determine the frequency of IC1 (900 Hz). C3, R5+R6, and the voltage at pin 9 determine
the frequency of IC2 (1580 Hz). If fIN is lower than 900 Hz, then the output P2 of phase-comparator 2 in IC1 is high and drives....
|
|
Generating Multiple Clock Outputs from the AD9540: AN-769 Analog Devices
Application Notes (app note added 2/06) |
|
Grounding for Low-and-High-Frequency Circuits: AN-345 Analog Devices
Application Notes (app note added 2/06) Know Your Ground and Signal Paths for Effective Designs. Current Flow Seeks Path of Least
Impedance-Not Just Resistance.... |
|
High Speed Comparator Techniques: AN13 Linear Technology The AN13 is an
extensive discussion of the causes and cures of problems in very high speed comparator circuits. A separate applications section presents
circuits, including a 0.025% accurate 1Hz to 30MHz V/F converter, a 200ns 0.01% sample-hold and a 10MHz fiber-optic receiver. Five appendices
covering related topics complete this note. |
|
High Speed Comparators Provide Many Useful Circuit Functions When Used Correctly: AN-352 Analog Devices Application Notes (app
note added 2/06) |
|
High Speed Peak Detector uses ECLComparator: 09/26/02
EDN Design Ideas / (added 10/03) Professional electronics designers often use peak-detector circuit sin such applications as
amplitude measurement, automatic gain control, and data regeneration. You can build a simple and fast peak detector from a serial diode and a
shunt capacitor, but it suffers from serious inaccuracy that stems from the diode's forward-voltage drop.. |
|
Keys to Longer Life for CMOS: AN-349 Analog Devices Application Notes
(app note added 2/06) Here's How CMOS Can be Protected Against Abuse |
|
LB-12: Linear Brief 12 an IC Voltage Comparator for High Impedance Circuitry:
National Semiconductor Application Note (app note added 2/06) |
|
LB-26: Linear Brief 26 Specifying Selected Op Amps and Comparators:
National Semiconductor Application Note (app note added 6/06) |
|
LB-32: Linear Brief 32 MicroVolt Comparator: National Semiconductor
Application Note (app note added 2/06) |
|
LB-39: Linear Brief 39 Circuit Techniques for Avoiding Oscillations in Comparator
Applications: National Semiconductor Application Note (app note added 2/06) |
|
LB-6: Fast Voltage Comparators with Low Input Current: National
Semiconductor Application Note (app note added 2/06) |
|
Light Sensor with Hysteresis: (schematic / circuit added
10/02) |
|
LM139/LM239/LM339 a Quad of Independently Functioning Comparators:
National Semiconductor Application Note 24-Jan-1999 (app note added 4/02) |
|
Low Voltage Alarm: NE555 Low Voltage Battery Disconnect
Circuit (added 4/02) |
|
Make a Delta-Sigma Converter using a Microcontroller's Analog Comparator Module:
Microchip Application Note Published 20-Jan-99 (app note added 2/06) |
|
MicroVolt Comparator #2: National Semiconductor
Application Notes,28-Jun-1996 (app note added 4/02) |
|
MicroVolt Comparator: National Semiconductor Application Note
(app note added 2/06) |
|
Missing Codes Tester Checks 16 Bit ADC in 7 Sec: 06/10/99 EDN-Design
Ideas / (added 7/03) As the resolution of ADCs increases from 12 to 16 bits and higher, the difficulty in testing the "nomissing-codes
"specification grows proportionately. To fully guarantee no missing codes for a 16-bit ADC requires testing all 2 16-1 possible output... |
|
Multiple Relay Drive: Circuit Ideas for Designers Application Notes
Advanced Linear Devices, Inc. (app note added 6/06) |
|
New Comparators Feature Micropower Operation Under All Conditions: DN137
Design Notes (Linear Technology) (app note added 1/06) |
|
Op Amp Comparator and Reference IC Provides Micropower Monitoring Capability Design
Note 190: DN190 Design Notes (Linear Technology) (app note added 1/06) |
|
PLL Implements FPGA Based SDRAM Controller : 05/21/98 EDN-Design Ideas /
(added 2/06) As FPGA capabilities increase and time to market decreases, FPGAs gain more acceptance for implementing both data and control
paths. Thus, they find wide use as controllers and datapath glue logic for fast-page DRAMs. Synchronous DRAMs (SDRAMs), whose control signals
use a clock input as reference, are a natural target for FPGA-based controllers. SDRAMs operate at frequencies of 100 MHz and higher (in
contrast with fast-page DRAMs, for which a 60-MHz memory-system clock was considered high). Figure 1 shows a way to implement FPGA-based SDRAM
controllers. Figure 2 shows the timing for a Xilinx XC4010E-2 device. You can apply the method to FPGAs from other vendors, as well as to
high-frequency systems other than SDRAMs.... |
|
Precision IC Comparator Runs from Plus 5 Volt Logic Supply:
National Semiconductor Application Note 04-Nov-1995 (app note added 4/02) |
|
Precision Ramp Generator and Comparator: Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
|
Push-Pull Complementary Power MOSFET Driver: Circuit Ideas for
Designers Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
|
Quad
Comparator Regulates Temperature: 10/26/95 EDN-Design Ideas / (added 3/03) |
|
Rail-to-Rail Voltage Comparator: Circuit Ideas for Designers Application
Notes Advanced Linear Devices, Inc. (app note added 6/06) |
|
Rail-to-Rail Voltage Comparator-23007.0: Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
|
Rail-to-Rail Window Comparator-23008.0: Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
|
Reset Supervisor Waits for Stable Supply: 04/17/03 EDN
Design Ideas / (added 1/05) The power-up cycle of the supply voltage in embedded-system applications is sometimes not a
clean event. This fact holds especially true in battery-operated systems, because the insertion of a battery often causes significant ringing
or glitching on the supply line (Figure 1). In products with on-off switches, the contact bounce of the switch can cause an unclean
power-up.... |
