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1. 发明公开

CN114499412A 一种滤波器带宽自动校准电路及方法审中-实审
公开(公告)号：CN114499412A
公开(公告)日：2022-05-13
申请号：CN202210009694.X
申请日：2022-01-05
申请人：浙江科睿微电子技术有限公司
发明人：张瑜诚 , 王影影
IPC分类号： H03C3/20 , H03H7/54 , H03H7/06
摘要：本发明公开了一种滤波器带宽自动校准电路及方法。本发明根据RC弛张振荡器的调谐电阻及调谐电容计算RC弛张振荡器应当产生的预设时钟周期个数，记录RC弛张振荡器产生的实际时钟周期个数，确定预设时钟周期个数对应的预设调谐控制信号，根据预设时钟周期个数、预设调谐控制信号及实际时钟周期个数计算实际时钟周期个数对应的实际调谐控制信号，将调谐电容的容值调整为实际调谐控制信号对应的容值，控制滤波器中带宽调节电容的容值与调谐电容的容值误差在允许范围内，可对滤波器的宽带进行自动校准，且与传统的压控振荡器的锁相环结构相比，电路结构简单、功耗低。

2. 发明专利

JP2008228141A Modulation circuit and transmitter 审中-公开
标题翻译：调制电路和发送器
公开(公告)号：JP2008228141A
公开(公告)日：2008-09-25
申请号：JP2007066312
申请日：2007-03-15
申请人： Epson Toyocom Corp , エプソントヨコム株式会社
发明人： KONUKI MASAHIRO
IPC分类号： H03B5/30 , H03C3/20 , H04L27/12
摘要： PROBLEM TO BE SOLVED: To provide a modulation circuit which reduces cost and is small-sized, and a transmitter using the same.
SOLUTION: As a SAW resonator, a lateral coupling type double-mode SAW resonator is used to be oscillated at two frequencies and an oscillation circuit is a Colpitts type. A FSK multicarrier modulation circuit 1 comprises: the SAW resonator 2 which functions as a lateral coupling type double-mode SAW resonator; a switch 3 which is connected with one inter-digital transducer (IDT) provided in the SAW resonator and switched so as to resonate the SAW resonator 2 in two modes; an amplifier circuit 4 for oscillation constituted of a load capacitor and an amplifier; and a variable capacitance circuit 5 constituted of a variable capacitance diode and a resistor.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供降低成本且小型化的调制电路以及使用该调制电路的发送器。解决方案：作为SAW谐振器，使用横向耦合型双模SAW谐振器以两个频率振荡，并且振荡电路是Colpitts型。 FSK多载波调制电路1包括：SAW谐振器2，其用作横向耦合型双模SAW谐振器; 开关3，其与设置在SAW谐振器中的一个数字间转换器（IDT）连接，并被切换以便以两种模式谐振SAW谐振器2; 用于由负载电容器和放大器组成的用于振荡的放大器电路4; 以及由可变电容二极管和电阻构成的可变电容电路5。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2002237721A MODULATOR FOR MICROWAVE AND MILLIMETER WAVE, AND OSCILLATOR 失效
公开(公告)号：JP2002237721A
公开(公告)日：2002-08-23
申请号：JP2001032434
申请日：2001-02-08
申请人： OKI ELECTRIC IND CO LTD
发明人： KOBAYASHI FUMI , AKIYAMA MASAHIRO
IPC分类号： H03B5/18 , H03C1/12 , H03C3/00 , H03C3/20 , H03D9/06
摘要： PROBLEM TO BE SOLVED: To provide a modulator whose modulation level is high and whose modulation sensitivity is satisfactory. SOLUTION: This modulator is provided with an oscillation circuit 12 and a resonator part 14. The resonator 14 is provided with a reflection circuit board 16, a connection line 18 formed on the reflection circuit board, a connection load 20 connected to one edge 18a of the connection line, a dielectric resonator 22 formed on the reflection circuit board and magnetically connected to the connection line, a window part 24 formed on the back face of the reflection circuit board just below the connection line, a waveguide resonator 26 formed in the area including the window part on the back face of the reflection circuit board and magnetically connected to the connection line, and a varactor diode 32 inserted between facing signal conductive faces 28 and 30 of the waveguide resonator and connected to an input modulation signal terminal 40. An other end 108b of the connection line is formed as the output port of the resonator part, and connected to an input port 12a of the osculation circuit, and a side 20a of the connection load which is not connected to the connection line is grounded.

4. 发明专利

JPS643362B2 失效
公开(公告)号：JPS643362B2
公开(公告)日：1989-01-20
申请号：JP9955881
申请日：1981-06-25
申请人： RCA CORP
发明人： JATSUKU RUDORUFU HAAFUOODO
IPC分类号： H04N5/52 , H03C3/20 , H03C3/30 , H03G3/30

6. 实用新型

JPS6030647U 失效
公开(公告)号：JPS6030647U
公开(公告)日：1985-03-01
申请号：JP11987683
申请日：1983-08-02
IPC分类号： H04B1/54 , H03C3/00 , H03C3/20

7. 发明专利

JPS50110556A 失效
公开(公告)号：JPS50110556A
公开(公告)日：1975-08-30
申请号：JP1578874
申请日：1974-02-06
IPC分类号： H03C3/20

8. 发明专利

JPS4917661A 失效
公开(公告)号：JPS4917661A
公开(公告)日：1974-02-16
申请号：JP5574272
申请日：1972-06-05
IPC分类号： H03C3/22 , H03C3/20 , H03C7/02

9. 实用新型

JPH054652U 失效
公开(公告)号：JPH054652U
公开(公告)日：1993-01-22
申请号：JP4928391
申请日：1991-06-27
IPC分类号： H03C3/09 , H03C3/20 , H04L27/20

10. 实用新型

JPS60189129U 失效
公开(公告)号：JPS60189129U
公开(公告)日：1985-12-14
申请号：JP7822784
申请日：1984-05-28
IPC分类号： H03H5/12 , H03C3/20 , H04B1/04

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