The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1992
Filed:
Nov. 21, 1990
Udo Moller, Duisburg, DE;
Martin Renner, Mettmann, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A monolithically integrated microcomputer clocked at a processor clock rate includes a clock generator in the form of an RC oscillator being synchronizable by external signals for controlling at least one functional unit operating asynchronously with the processor clock rate. The RC oscillator has a frequency-determining resistor and a frequency-determining capacitor being monolithically integrated. The frequency-determining capacitor is formed of a plurality of switchable capacitors to be interconnected to make a total capacitor with a variable size. Registers are each connected to a respective one of the capacitors for defining a switching state of the switchable capacitors. A central processing unit is connected to the registers for adjusting the frequency of the clock generator by setting the registers.