Title:
【発明の名称】接地の上と下における低電圧感知用に最適化された単一電源電圧-周波数変換器
Document Type and Number:
Japanese Patent JP2001520391
Kind Code:
A
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.
Inventors:
Meders, Urs H
Application Number:
JP2000516434A
Publication Date:
October 30, 2001
Filing Date:
September 25, 1998
Export Citation:
Assignee:
Maxim Integrated Products Incorporated
International Classes:
G01R19/00; G01R19/252; G01R31/36; H03F1/30; H03F3/45; H03K7/06; (IPC1-7): G01R19/252; G01R31/36
Attorney, Agent or Firm:
Masaki Yamakawa