L64704 LSI Logic Corporation, L64704 Datasheet - Page 211

• Manufacturer Part Number: L64704
• Description: Satellite Decoder Technical Manual 5/97
• Manufacturer: LSI Logic Corporation

C.1
Introduction
Figure C.1
Simplest Oscillator
Appendix C
Oscillator Cells
This appendix describes the LSI Logic oscillator cells used in the
L64704. These cells are designed to be used with external components
to form an oscillator circuit.
Oscillator cells exist at LSI Logic in both Channel-Free Arrays and Cell-
Based ASIC technologies. These cells have been designed to work with
external crystals and RLC components. Passive component values on
semiconductor ICs are far too variable to provide the accuracy required
to obtain stable oscillation frequencies.
The simplest oscillator consists of an inverting gate with the output
connected to the input as shown in
Most designers avoid this type of oscillator, because its frequency is too
dependent on wafer processing variations, bias voltage values, and
temperature effects. The oscillator in
when unwanted, positive feedback paths creep into a design, causing the
apparent effect shown.
Figure
Figure C.1
C.1.
is most commonly found
C-1