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Few Extra Components Stabilize Oscillator - 02/15/96 EDN-Design Ideas: (design
idea added 3/03) |
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FIFO Makes Cheap Waveform Generator - 12/21/95 EDN-Design Ideas: (design idea
added 3/03) |
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FleaPower Oscillator Consumes only 1 µA - 05/21/98 EDN-Design Ideas: A simple way
to make an oscillator is to use a resistor, a capacitor, and a Schmitt trigger (Figure
1a). However, this circuit uses several tens of microamperes because of the voltage
transitions at the Schmitt trigger's input. The CMOS device consumes almost no power
when the input is either high or low. Whenever the input voltage is at an.....(design
idea added 7/03) |
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Fully Isolated 50/60Hz Sync Generator - This circuit will produce a single pulse
at the zero voltage cross points of the power line voltage. An opto-coupler
provides a very safe 5KV isolation. (added 12/04) ….(designed by David A.
Johnson) |
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Function Generator - Circuit Ideas for Designers Application Notes Advanced Linear
Devices, Inc. (app note added 6/06) |
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Function Generator (Andy Collinson) - A function generator using the ICL8038
integrated circuit. Is has four ranges and capable of sine, square and triangle
outputs…..(electronic design added 6/07) |
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Gated Oscillator Emulates a Flip Flop - 03/16/95 EDN-Design Ideas: (design idea
added 03/03/03) |
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Gates Provide Low Cost Sine Wave Generator - 08/15/97 EDN-Design Ideas: (design
idea added 3/03) |
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Generate CID/CIDCW Analog Signals - 12/07/00 EDN-Design Ideas: / A high-speed µP
can generate CID (caller-ID)and CIDCW (caller-ID-on-callwaiting)analog signals (Figure
1). CID data transmits at 1200 baud FSK between the first and second 20-Hz ring of an
incoming call. CIDCW uses a CAS (CPE Alert Signal)dual tone, which consists of 2130
and 2750 Hz to initiate the FSK data transfer.....(design idea added 5/02) |
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Generate frequencies with arbitrary relationships - 03/16/00 EDN-Design Ideas: The
circuit in Figure 1 and the program in Listing 1 use an Atmel 89C2051 µC to generate a
variety of frequencies that have no specific relationship to each other. The example
given here generates the following eight frequencies: 500, 700, 1000, 1050, 1100,
1500, 1700, and 00 Hz. The program delivers these frequencies on eight I/O pins (P17
to P10, respectively)of the µC. The program associates each of these I/O pins with an
internal-RAM address (f1 through f8).....(design idea added 2/06) |
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Generate stabilized PWM signals - 08/17/00 EDN-Design Ideas: (design idea added
11/05) |
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Generating & Downloading Data to the ESG-D RF Signal Generator for Digital Modulation
- Aligent App Note (app note added 6/07) |
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Generating Digital Modulation with the ESG-D Series Dual Arbitrary Waveform Generator,
Option UND - Aligent Application Note (app note added 6/07) |
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Generating Low Duty-Cycle Pulses with a Function Generator (5988-7507EN): Aligent
Application Note (added 2/06) - Aligent Application Note 1407 (added
4/08) |
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Generator Features Programmable Duty Cycle - 11/23/94 EDN-Design Ideas: The simple
pulse generator in Fig 1 allows you to program its output's duty cycle. You apply your
duty-cycle code to the B port of IC1, a 7485 magnitude comparator. The clock
increments the 74193 4-bit counter, IC2. When the output of the counter is equal to or
greater than your duty-cycle code, IC3 resets the output flip-flop, IC4, until the
counter.....(design idea added 3/03) |
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HAM Radio BFO - circuit diagram of beat frequency oscillator using BF494 and how
to listen amateur radio communication on ordinary BC receiver. . (added 01/05) |
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Harmonic Oscillator - (electronic circuit added 7/03) |
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Hartley oscillator requires no coupled inductors - 10/26/06 EDN-Design Ideas:
Examine a traditional Hartley oscillator circuit, and you'll note its trademark: a
tapped inductor that determines the frequency of oscillation and provides
oscillation-sustaining feedback. Although you can easily calculate the total
inductance required for a given frequency.....(design idea added 09/06) |
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HCMOS Crystal Oscillator - Fairchild Semiconductor Application Note 340, May 1983
(app note added 02/05) |
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High Power Touch Switch Exciter Circuit - If you have hundreds of touch switches
that need an excitation signal, then this circuit is what you need. Its 20KHz
20v peak to peak output signal can supply up to 3 watts of touch switch excitation
power. ….(designed by David A. Johnson) |
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How to Connect Two or More Signal Generators to Create a Multi-Channel Waveform
Generator - Agilent Application Note (added 4/11 |
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I.F. Amplifier - The I.F. transformer primary has 18 turns, the secondary winding
has 4 turns. The capacitors across the IFT primaries are 82pF. The input/output
transformer has 12 turns, tapped at 3 turns from ground. This transformer is wound on
a ferrite core. The mosfets are 3SK45's. The diodes in the product detector are
1N34's. I use a six pole SSB filter from a scrap CB. The centre frequency is 7.8MHz.
The -6db bandwidth is about 2.5KHz. (added 02/05) |
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IF Signal Generator - (electronic circuit added 05/07) |
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Improved PL Tone Decoder - (electronic schematic / circuit added 4/02) |
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Input Stage for Crystal A to D Converters - AS043 Jenson Transformer Application
Note (app note 04/03/02) |
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Input Transformer for Crystal CS5367 A/D Converter - AS086 Jenson Transformer
Application Note. Transformer balanced passive input circuit for CS5367 A/D
converter (app note 04/03/02) |
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JT-11SSP-6M as Input Transformer for Crystal CS5367 A/D Converter - AS086 Jenson
Transformer Application Note. Transformer balanced passive input circuit for
CS5367 A/D converter (app note 04/03/02) |
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JT-6110K-B at Input Stage for Crystal A to D Converters - AS043 Jenson Transformer
Application Note (app note 04/03/02) |
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Kick start a crystal oscillator in SPICE - 02/05/04 EDN-Design Ideas: In low-noise
analog circuits, a high-gain amplifier serves at the input to increase the SNR. The
input signal level determines the input-stage gain; low-level signals require the
highest gain. It is also standard practice in low-noise analog-signal processing to
make the circuit's....(added 10/05) |
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LB-16: Easily Tuned Sine Wave Oscillators - National Semiconductor Application
Note (app note added 2/06) |
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LC Colpitts Oscillator operates on 0.5V to 5V Single Supply - Circuit Ideas for
Designers Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
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LC Oscillator has 1% THD - 03/31/94 EDN-Design Ideas: At the heart of many
oscillators is a parallel-resonant LC tank circuit whose impedance is infinite at the
resonant frequency of 1/2[pi]ÖLC Hz. Infinite impedance implies an absence of parallel
damping resistance, so once an ideal tank circuit.....(design idea added 03/03/03) |
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LC oscillator has stable amplitude - 10/27/05 EDN-Design Ideas: Simplified design
offers low distortion, self-adjustment.....(design idea added 11/05) |
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LED RF Signal Meter - (circuit added 6/07) |
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Linkwitz Cosine Burst Generator - part of speaker measurement set described in the
construction article (added 04/03/02) |
|
Low cost BER Tester measures errors in low data rate applications - 12/05/05 EDN-Design
Ideas: You don't need an expensive pattern generator to produce a PRBS
(pseudorandom-bit-sequence)signal for making elementary BER (bit-error-rate)measurements
in low-data-rate continuous-transmission systems.....(design idea added 05/07) |
| Low Distortion Crystal Oscillator - (electronic
circuit added 7/03) |
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Low Distortion Oscillator Starts Fast - 05/26/94 EDN-Design Ideas: Unlike a Wien-bridge
oscillator, the phase-shift oscillator in Fig 1 starts up quickly. Also, the circuit
does not require that you adjust several trimming resistors just to tune the
oscillator to a given frequency. Experiments show that the circuit's total harmonic
distortion (THD)measures.....(design idea added 3/03) |
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Low Frequency Crystal Controlled Oscillator - The RF engineer sometimes has to
look for an instrument that will check a low frequency quartz crystal unit reliably
and rapidly. This is a difficult piece of equipment to find and the engineer often has
to consult an electronic circuits handbook for the schematic of a circuit that will
perform the task. Unfortunately, ....added 11/05) |
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Low Frequency Sine Wave Generator - The two circuits below illustrate generating
low frequency sine waves by shifting the phase of the signal through an RC network so
that oscillation occurs where the total phase shift is360 degrees. (added 5/02) |
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Low-distortion Audio-range Oscillator - Generates very low-distortion sine waves
up to 1V RMS No thermistors required No settling time (added 3/05) |
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Low-Pass Filter RFI Filter - Circuit Ideas for Designers Application Notes
Advanced Linear Devices, Inc. (app note added 6/06) |
