公开(公告)号：US20170179892A1

公开(公告)日：2017-06-22

申请号：US15435442

申请日：2017-02-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yoshiaki HARASAWA ,  Fuminori MORISAWA

IPC: H03F1/30 ,  H03F3/24

CPC classification number: H03F1/30 ,  G05F3/20 ,  H03F1/301 ,  H03F3/245 ,  H03F2200/451 ,  H03F2200/528 ,  H03F2200/555

Abstract: Provided is a bias control circuit that includes: a reference voltage circuit that generates a reference voltage; a resistor; a temperature dependent current generating circuit that generates a temperature dependent current, which changes depending on temperature, on the basis of the reference voltage and that supplies the temperature dependent current to one end of the resistor; a reference voltage buffer circuit that applies the reference voltage to the other end of the resistor; a constant current generating circuit that generates a constant current, which is for driving the reference voltage buffer circuit, on the basis of the reference voltage and that supplies the constant current to the other end of the resistor; and a bias generating circuit that generates a bias voltage or a bias current for a power amplification circuit on the basis of the voltage at the one end of the resistor.

公开(公告)号：US20180152151A1

公开(公告)日：2018-05-31

申请号：US15871275

申请日：2018-01-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yoshiaki HARASAWA ,  Fuminori MORISAWA

IPC: H03F1/30 ,  H03F3/24

CPC classification number: H03F1/30 ,  G05F3/20 ,  H03F1/301 ,  H03F3/245 ,  H03F2200/451 ,  H03F2200/528 ,  H03F2200/555

Abstract: Provided is a bias control circuit that includes: a reference voltage circuit that generates a reference voltage; a resistor; a temperature dependent current generating circuit that generates a temperature dependent current, which changes depending on temperature, on the basis of the reference voltage and that supplies the temperature dependent current to one end of the resistor; a reference voltage buffer circuit that applies the reference voltage to the other end of the resistor; a constant current generating circuit that generates a constant current, which is for driving the reference voltage buffer circuit, on the basis of the reference voltage and that supplies the constant current to the other end of the resistor; and a bias generating circuit that generates a bias voltage or a bias current for a power amplification circuit on the basis of the voltage at the one end of the resistor.