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0.3V Crystal Oscillator Circuit with Buffered Output - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
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0.5V Crystal Oscillator Circuit with Output Buffer - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
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2 Second Time Base from Crystal Oscillator - The schematic above illustrates
dividing a crystal oscillator signal by the crystal frequency to obtain an accurate
(0.01%) 1 second time base. Two cascaded 12 stage counters (CD4040) form a 24 stage
binary counter and the appropriate bits are gated together to produce the desired
division. Using a crystal of some even multiple of 2 is desirable so that one stage of
the counter automatically toggles every second which eliminates the need for the NAND
gate and reset circuitry, however the circuit below illustrates using a crystal which
is not an even multiple of 2 and so requires additional...(electronic circuit added
7/03) |
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2 Tone Audio Oscillator use for SSB Tests - (electronic schematic / circuit added
4/02) |
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32.768 kHz Oscillator using a Common Watch Crystal - Below are a couple circuits
you can use to produce a 32.768 KHz square wave from a common watch crystal. The
output can be fed to a 15 stage binary counter to obtain a 1 second square wave. The
circuit on the left using the 4069 inverter is recommended over the transistor circuit
and produces a better waveform. The single transistor circuit....(electronic diagram
added 6/06) |
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40kHz LED Test Signal Generator - This 40KHz crystal controlled oscillator circuit
drives an infrared LED with powerful 40ma pulses. The circuit can be used to
test optical communications circuits, designed to receive 40KHz modulated light
signals. ….(designed by David A. Johnson) |
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5 Hints for Debugging MicroController-based Designs AN 1458 - Agilent Application
Note (added 6/06) |
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A Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850 -
AN-419-Analog Device Application Notes (app note added 6/06) |
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AN-1320: Enhancing CLC031 Jitter Performance with Easy-To-Use VCXOs - National
Semiconductor Application Note (app note added 2/06) |
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AN181 Using the Crystal 8900A in 8-Bit Mode - (app note added 6/07) |
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AN-400: A Study of the Crystal Oscillator for CMOS-COPS - National Semiconductor
Application Note (app note added 2/06) |
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AN-419: A Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850 -
AN-419-Analog Device Application Notes (app note added 6/06) |
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AN-666: DTMF Generation with 3.58 MHz Crystal - National Semiconductor Application
Note (app note added 6/06) |
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AN826: Crystal Oscillator Basics & Crystal Selection for RFPIC™ & PICmicro® Devices
- Microchip Application Note Published 17-Jan-02 (app note added 2/06) |
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CMOS Oscillator - ASCII format (added 7/03) |
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Crystal 32.768kHz CMOS Oscillator - ASCII format (electronic circuit added 7/03) |
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Crystal Considerations with Dallas Real-Time Clocks RTCs - Maxim App Note #58 (app
note added 02/05) |
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Crystal Controlled Oscillator (Ramon Vargas) - 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, there aren't many such circuits in the technical
literature currently available, and when found, they don't always work as expected. A
circuit that has been found to work at full satisfaction in the frequency range from
10 kHz to 500 kHz is illustrated in Figure 1. (added 11/05) |
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Crystal Controlled Time Base Generator - (electronic Circuit / Schematic added
10/04) |
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Crystal Oscillator (Chrontel) - Chrontel Application Note-06, This application
note addresses issues commonly raised during the selection of the reference crystal,
typically
14.318 MHz, for Chrontel's product line….. (added 02/05) |
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Crystal Oscillator (Goran Olsson) - ASCII format, The world is full of xtal
oscillators twiddled by digital designers lacking in the analog design knowledge
necessary. Just look at all the PC real time clocks that lags or leads by several
minutes per day. And they eat backup batteries too! IC's with pins that say "Xtal
here" can't be trusted either!.... (added 7/03) |
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Crystal Oscillator (Pericom App Note) - Pericom Semiconductor Application Note #
083, (app note added 02/05) |
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Crystal Oscillator Basics & Crystal Selection for RFPIC™ & PICmicro® Devices -
Microchip Application Note Published 17-Jan-02 (app note added 2/06) |
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Crystal Oscillator overcomes typical Drawbacks - 08/17/98 EDN-Design Ideas:
(design idea added 3/03) |
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CX Minature Crystals Circuits - Euro QuartzCX-6V-SM (added 02/05) |
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CX-1SM Crystal 530kHz to2.1MHz - Statek App Notes (added 02/05) |
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Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850 -
AN-419-Analog Device Application Notes (app note added 6/06) |
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HCMOS Crystal Oscillator - Fairchild Semiconductor App Note 340, May 1983 (app
note added 02/05) |
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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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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.... (added 10/05) |
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Low Distortion Crystal
Oscillator - (electronic circuit added 7/03) |
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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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One Second Time Base from Crystal Oscillator - (electronic circuit added 7/03) |
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Pierce Crystal Oscillator Design - The Pierce oscillator ... is essentially a
common emitter amplifier with a tuned circuit for a collector load and a quartz
crystal as a feedback element. In order to determine whether the Barkhausen criteria
is satisfied, loop gain must be determined at the frequency of oscillation. This is
accomplished by drawing the AC equivalent circuit of the Pierce Oscillator... (added
02/05) |
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Pierce-gate Oscillator Crystal load calculator - RF Design Design Tips, July 2004
(added 02/05) |
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Specifying Quartz Crystals - Maxim Application Notes / 726 / Dec-08 (app
note added 5/08) |
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Study of the Crystal Oscillator for CMOS CoPS - National Semiconductor Application
Note 04 Nov1995 (app note added 2/03) |
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Tiny Crystal Oscillator (Wenzel) - High-stability gate oscillator uses two, 5-pin
SOT packageddevices (added 7/03) |
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Two Tone Audio Oscillator use for SSB Tests - (electronic schematic / circuit
added 2/05) |
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Ultra Low Power 32kHz Crystal Oscillator - I have used this circuit many times
when I needed a low frequency reference, which did not draw much power. With the
components show, the current from a 3v battery is less than 1.2 microamps.
(added 12/04) ….(designed by David A. Johnson) |
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Ultra Low Voltage Crystal Oscillator Circuit using Active Loads - Circuit Ideas
for Designers Application Notes Advanced Linear Devices, Inc. (app note added
6/06) |
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Ultra Low Voltage Micropower Crystal Oscillator Circuit - Circuit Ideas for
Designers Application Notes Advanced Linear Devices, Inc. (app note added 6/06) |
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Use of the CMOS Unbuffered Inverter in Oscillator Circuit - Texas Instrument
Application ReportSZZA043 January 2004 (added 02/05) |
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Using the 16MHz Crystal Oscillators - Freescale AN2006 (ap note added 6/07) |
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Very Low Power Gated Crystal Oscillator - The circuit gates the output of a
continuously operating 32KHz crystal oscillator to the input of a C-MOS buffer when
clock pulses are needed. The technique gets around the problem of a slow starting
crystal oscillator by keeping the oscillator going and switching on a transistor power
stage only as needed. The method keeps the standby power consumption to a very low 1uA
when used with a 3v supply. ….(designed by David A. Johnson) |
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Wide Swing Variable Crystal Oscillator - (electronic schematic / circuit added
2/05) |
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XTAL-Controlled FM TX (V6) - My FM Wireless microphone V5 has been very popular,
both as a beginners project and as a kit. It is interesting that it has also been the
biggest cause of lots of e-mail, the most common question being How can I make it
crystal controlled?. The oscillator can be made crystal controlled; replace the 2p7
with a 5th harmonic crystal. The oscillator will then be very stable, so stable in
fact, that it cannot even be modulated! This means that you could only use it to send
CW (morse code).....(circuit / schematic design added 6/06) |
