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Phased
Locked Loop (PLL) Circuits, Page
1
PLL's: #'s - A B - O
PQ - Z Last Updated on:
Friday, February 05, 2010 10:05 AM
Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
1W Portable PLL transmitter - This small FM transmitter includes a limiter, a
microphone amplifier and a PLL digital tuning. All the parts are placed on one
circuit board. The RF power is….(electronic circuit added 08/07/06)
5W PLL Stereo Transmitter with LCD - Here's PLL FM transmitter circuit from
china. This circuit uses the familiar 2SC1971 for final power amplifier stage.
…(electronic circuit added 08/08/08)
AN-347: Shielding & Guarding - AN-347-Analog Device Application Notes (app
note added 2/06) How to Exclude Interference-Type Noise.What to do and Why to do
itA Rational Approach
AN-349: Keys to Longer Life for CMOS - AN-349 Analog Devices Application Notes
(app note added 09/08) Here's How CMOS Can be Protected Against Abuse
Audio noise generator drives earphones or small speaker - This is a circuit that
generates white noise, rolled-off to drive earphones or a small speaker. White noise
creates is a "rushing" sound, which sounds something like air rushing by your ear(s).
White noise would be flat with frequency, and since this circuit rolls off within the
audio range, I refer to it as "rolled-off" noise. White (or rolled-off) noise....
(circuit added 6/07)
AVR ATMega8 board for PLL MC145170 - This board allow to manage a FM transmitter
including a Phase Locked Loop (PLL)on a serial bus (SPI) like a MC145170. A current
frequency is memorized in EEPROM to configure PLL at power up. Three auxiliairy
frequencies are available for maintenance function and/or HF adjust. A local interface
include 4 keys and a LCD display enable to modify transmitter parameters. This board
can be completely drived from a serial link RS232 (19200 Bds,8b data,2b stop, no
parity). A temperature sensor enable to control working temperature and 2 analog input
are used for HF power measure (Forward and Reflected). Information about TOS
protection activation is processed by this board to inform user (local and remote) on
a TOS Alarm. ….(electronic schematic added 11/08)