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. 02, 2001
Filed:
Jun. 23, 1999
Urs H. Mader, Sunnyvale, CA (US);
Maxim Integrated Products, Inc., Sunnyvale, CA (US);
Abstract
A voltage to frequency converter using a charge pump to restore the output voltage of the input integrator. The charge pump implementation allows the voltage to frequency converter's input to sense voltage above and below ground with a single supply using a charge pump, which can provide either a positive charge or a negative charge as the restoring force to the integrator. Inclusion of an interleaved charge pump provides advantages of implementation simplicity and of high performance. The voltage to frequency converter concentrates all offset and leakage errors at the input of the integrator amplifier, which in the preferred embodiment is a chopper stabilized amplifier providing very low offset. The voltage to frequency converter is intended for realization in integrated circuit form, providing very high performance in an integrated circuit having very low power requirements.