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0.3V Crystal Oscillator Circuit with Buffered Output - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note)

0.5V Crystal Oscillator Circuit with Output Buffer - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note)

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)

2 Tone Audio Oscillator use for SSB Tests - (electronic schematic / circuit)

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)

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)

5 Hints for Debugging MicroController-based Designs AN 1458 - Agilent Application Note)

A Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850  - AN-419-Analog Device Application Notes  (app note)

AN-1320: Enhancing CLC031 Jitter Performance with Easy-To-Use VCXOs - National Semiconductor Application Note  (app note)

AN181 Using the Crystal 8900A in 8-Bit Mode - (app note)

AN-400: A Study of the Crystal Oscillator for CMOS-COPS - National Semiconductor Application Note  (app note)

AN-419: A Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850  - AN-419-Analog Device Application Notes  (app note) 

AN-666: DTMF Generation with 3.58 MHz Crystal - National Semiconductor Application Note  (app note)

AN826: Crystal Oscillator Basics & Crystal Selection for RFPIC™ & PICmicro® Devices - Microchip Application Note Published 17-Jan-02  (app note)

CMOS Oscillator - ASCII format

Crystal 32.768kHz CMOS Oscillator - ASCII format (electronic circuit)

Crystal Considerations with Dallas Real-Time Clocks RTCs - Maxim App Note #58 (app note)

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.

Crystal Controlled Time Base Generator - (electronic Circuit / Schematic)

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

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!.

Crystal Oscillator (Pericom App Note) - Pericom Semiconductor Application Note # 083, (app note)

Crystal Oscillator Basics & Crystal Selection for RFPIC™ & PICmicro® Devices - Microchip Application Note Published 17-Jan-02  (app note)

Crystal Oscillator overcomes typical Drawbacks - 08/17/98 EDN-Design Ideas: (design idea)

CX Minature Crystals Circuits - Euro QuartzCX-6V-SM

CX-1SM Crystal 530kHz to2.1MHz - Statek App Notes)

Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850 - AN-419-Analog Device Application Notes  (app note)

HCMOS Crystal Oscillator - Fairchild Semiconductor App Note 340, May 1983 (app note)

Input Stage for Crystal A to D Converters - AS043 Jenson Transformer Application Note  (app note 04/03/02)

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)

JT-6110K-B at Input Stage for Crystal A to D Converters - AS043 Jenson Transformer Application Note  (app note 04/03/02)

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.

Low Distortion Crystal Oscillator - (electronic circuit)

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.

One Second Time Base from Crystal Oscillator - (electronic circuit)

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..

Pierce-gate Oscillator Crystal load calculator - RF Design Design Tips, July 2004

Specifying Quartz Crystals - Maxim Application Notes / 726 / Dec-08  (app note)

Study of the Crystal Oscillator for CMOS CoPS - National Semiconductor Application Note 04 Nov1995 (app note)

Tiny Crystal Oscillator (Wenzel) - High-stability gate oscillator uses two, 5-pin SOT packaged devices

Two Tone Audio Oscillator use for SSB Tests - (electronic schematic / circuit)

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. (designed by David A. Johnson)

Ultra Low Voltage Crystal Oscillator Circuit using Active Loads - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note)

Ultra Low Voltage Micropower Crystal Oscillator Circuit - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note)

Use of the CMOS Unbuffered Inverter in Oscillator Circuit - Texas Instrument Application ReportSZZA043 January 2004

Using the 16MHz Crystal Oscillators - Freescale AN2006 (ap note)

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)

Wide Swing Variable Crystal Oscillator - (electronic schematic / circuit)

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)

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