MOS transistor resistor, filter, and integrated circuit

A technology of MOS transistors and resistors, which is applied in the direction of transistors, circuits, electric solid-state devices, etc., can solve the problems such as difficult to form filters, and achieve the effect of reducing the change of resistance value and good temperature characteristics
CN102089971AInactive Publication Date: 2011-06-08PANASONIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PANASONIC CORP
Publication Date
2011-06-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

Disclosed is a MOS transistor resistor that is equipped with a first MOS transistor (M1), which is used as a resistor, an input voltage source (1), which is connected, and applies an input voltage (Vin), to the source of the first MOS transistor, and a gate voltage source (6), which is connected, and applies a gate voltage (Vg), to the gate of the first MOS transistor. The gate voltage (Vg) and input voltage (Vin) are set in a range to cause the first MOS transistor to operate with the gate-source voltage and the source-drain voltage in the first MOS transistor in the unsaturated zone, and are set so that the temperature characteristics at the resistance value of the first MOS transistor become constant. Fluctuations in resistance value, which are caused by changes in leakage current due to manufacturing variances, are decreased and excellent temperature characteristics are obtained.
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Description

technical field

[0001] The present invention relates to a resistor using a MOS transistor, and particularly to a MOS transistor resistor suitable for use in an electronic device that performs sound signal processing such as a microphone or that performs signal processing including a sensor, and the integrated circuit. Background technique

[0002] Conventionally, it is known to use MOS transistors as resistors. As an example of use of such a MOS transistor resistor, the voltage comparator circuit disclosed in Patent Document 1 such as Figure 11 shown.

[0003] This voltage comparison circuit is composed of a comparator 7, MOS transistors M5, M6, and a capacitor C. As shown in FIG. The signal input from the signal source Vsg is input via the capacitor C, and the MOS transistors M5 and M6 are used as resistors.

[0004] The operation of the resistor composed of MOS transistors M5 and M6 in this voltage comparator will be described below. extracted by Figure 11 The part of...

Claims

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