KR20060070851A - Broadband downstream active mixer - Google Patents

Broadband downstream active mixer Download PDF

Info

Publication number
KR20060070851A
KR20060070851A KR1020040109661A KR20040109661A KR20060070851A KR 20060070851 A KR20060070851 A KR 20060070851A KR 1020040109661 A KR1020040109661 A KR 1020040109661A KR 20040109661 A KR20040109661 A KR 20040109661A KR 20060070851 A KR20060070851 A KR 20060070851A
Authority
KR
South Korea
Prior art keywords
signal
unit
current
broadband
transconductance
Prior art date
Application number
KR1020040109661A
Other languages
Korean (ko)
Other versions
KR100669246B1 (en
Inventor
박봉혁
이승식
김재영
Original Assignee
한국전자통신연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to KR1020040109661A priority Critical patent/KR100669246B1/en
Publication of KR20060070851A publication Critical patent/KR20060070851A/en
Application granted granted Critical
Publication of KR100669246B1 publication Critical patent/KR100669246B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes
    • H03D7/125—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes with field effect transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0066—Mixing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)

Abstract

본 발명은 광대역 하향 능동 혼합기에 관한 것으로, 특히 단일모드 입력 신호(RFin)를 차동모드 신호로 변환하는 트랜스컨덕턴스부(100); 상기 트랜스컨덕턴스부(100)로부터 발생된 음(negative)의 신호 및 양(positive)의 신호와 로컬에서 발생된 신호를 혼합하는 스위칭부(200); 스위칭부(200)를 통해 혼합된 신호의 전류 성분을 전압으로 변환하며 광대역 특성을 갖게 하는 부하 저항(R1, R2, R3, R4); 전류를 분배하는 전류 브리딩부(300); 및 부하 저항(R1, R2, R3, R4) 양단에 연결된 캐패시터(C1, C2, C3, C4)로 구성된 것을 특징으로 하며, 이러한 본 발명은 전류 브리딩 장치를 구성하여 광대역 특성을 나타내는 저항 부하와 전압 이득을 증가시키고, 저항 부하 양단에 캐패시터를 삽입하여 잡음 특성을 향상시켜 주는 뛰어난 효과가 있다.The present invention relates to a wideband downlink active mixer, and more particularly, a transconductance unit 100 for converting a single mode input signal RFin into a differential mode signal; A switching unit 200 for mixing a negative signal and a positive signal generated from the transconductance unit 100 and a signal generated locally; Load resistors R1, R2, R3, and R4 that convert current components of the mixed signal into voltages through the switching unit 200 and have broadband characteristics; A current breathing unit 300 for distributing current; And capacitors C1, C2, C3, and C4 connected to both ends of the load resistors R1, R2, R3, and R4, and the present invention constitutes a current breathing device to provide a broadband load characteristic and a resistive load and voltage. There is an excellent effect of increasing the gain and improving the noise characteristics by inserting capacitors across the resistive load.

UWB 시스템, RF 수신단, 하향 혼합기, 트랜스컨덕턴스 장치, UWB system, RF receiver, down mixer, transconductance device,

Description

광대역 하향 능동 혼합기{BROADBAND DOWNSTREAM ACTIVE MIXER} BROADBAND DOWNSTREAM ACTIVE MIXER}             

도 1은 종래의 하향 혼합기의 구성을 나타낸 회로도,1 is a circuit diagram showing the configuration of a conventional down mixer;

도 2는 본 발명의 일 실시예에 따른 광대역 하향 능동 혼합기의 구성을 나타낸 회로도이다.2 is a circuit diagram illustrating a configuration of a broadband downlink active mixer according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100 : 트랜스컨덕턴스부 101 : 제 1 NMOS100: transconductance unit 101: first NMOS

102 : 제 2 NMOS 103 : 캐패시터102: second NMOS 103: capacitor

200 : 스위칭부 203 : 제 3 NMOS200: switching unit 203: third NMOS

204 : 제 4 NMOS 205 : 제 5 NMOS204: fourth NMOS 205: fifth NMOS

206 : 제 6 NMOS 207 : 제 7 NMOS206: Sixth NMOS 207: Seventh NMOS

208 : 제 8 NMOS 209 : 제 9 NMOS208: 8th NMOS 209: 9th NMOS

210 : 제 10 NMOS 300 : 전류 브리딩부210: 10th NMOS 300: current breathing unit

301∼304 : PMOS R1∼R4 : 저항301 to 304: PMOS R1 to R4: resistance

C1∼C4 : 캐패시터C1 to C4: Capacitor

본 발명은 UWB(Ultra-Wide Band) 통신 시스템의 RF(Radio Frequency) 수신단에 적용되는 광대역 하향 능동 혼합기에 관한 것으로, 더욱 상세하게는 단일 모드로 입력되는 신호를 차동 모드 신호로 변환한 후 스위칭 장치에서 유입되는 전류와 혼합하여 IF(Intermediate Frequency) 신호로 변환하는 것으로서, 광대역 신호를 위해 저항 부하를 사용함과 동시에 전압 이득을 높이기 위해 전류 브리딩 기법을 적용하여 구현한 광대역 하향 능동 혼합기에 관한 것이다.The present invention relates to a wideband downlink active mixer applied to a radio frequency (RF) receiver of an ultra-wide band (UWB) communication system, and more particularly, a switching device after converting a signal input in a single mode into a differential mode signal. It converts into an IF (Intermediate Frequency) signal by mixing with the current flowing in, and relates to a broadband downlink active mixer implemented by applying a current breathing technique to increase the voltage gain while using a resistive load for a wideband signal.

주지하다시피, 종래 UWB 통신 시스템의 RF 수신단에 적용된 하향 혼합기는 도 1에 도시된 바와 같은 회로로 구성되어 있었다. 이러한 종래의 하향 혼합기에 대해 살펴보면, 차동 모드로 들어온 신호(1)는 트랜스포머(Transformer)(10)를 통하여 트랜지스터(Transistor)들(21, 22)의 베이스(Base) 단으로 각각 입력되고, 이 신호는 트랜지스터들(21, 22, 23, 24, 25, 26)를 통해 스위칭 장치에서 들어오는 전류 신호(2)와 혼합되어 IF 신호(3)로 출력된다. 하지만, 상술한 종래의 하향 혼합기는 특정 주파수에서 신호가 출력되게 하기 위하여 부하단에 인덕터(Inductor)(L1, L2)를 사용하였기 때문에 광대역 특성을 얻기가 어려울 뿐만 아니라, 잡음 특성이 나쁜 문제점이 있었다.As is well known, the downmixer applied to the RF receiver of the conventional UWB communication system has been composed of a circuit as shown in FIG. Referring to the conventional down mixer, the signal 1 entered into the differential mode is input to the base stage of the transistors 21 and 22 through the transformer 10, respectively. Is mixed with the current signal 2 coming from the switching device through the transistors 21, 22, 23, 24, 25, 26 and output as the IF signal 3. However, the above-described conventional downlink mixer uses the inductors L1 and L2 in the load stage in order to output a signal at a specific frequency, so that it is difficult to obtain broadband characteristics and has a bad noise characteristic. .

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 이루어진 것으로서, 본 발명의 목적은 단일 모드로 입력되는 신호를 차동 모드 신호로 변환한 후 스위칭 장치에서 유입되는 전류와 혼합하여 IF 신호로 변환함에 있어, 전류 브리딩 장치를 구성하여 광대역 특성을 나타내는 저항 부하와 전압 이득을 증가시키고, 저항 부하 양단에 캐패시터를 삽입하여 잡음 특성을 향상시키기 위한 광대역 하향 능동 혼합기를 제공하는 데 있다.
Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to convert a signal input in a single mode into a differential mode signal and then mix with a current flowing from a switching device into an IF signal. In this case, the current breathing device is configured to increase the resistive load and the voltage gain exhibiting the broadband characteristics, and to insert a capacitor across the resistive load to provide a broadband downlink active mixer for improving the noise characteristic.

상기와 같은 목적을 달성하기 위하여 본 발명 광대역 하향 능동 혼합기는, 단일모드 입력 신호(RFin)를 차동모드 신호로 변환하는 트랜스컨덕턴스부; In order to achieve the above object, the present invention provides a broadband downlink active mixer comprising: a transconductance unit for converting a single mode input signal (RFin) into a differential mode signal;

상기 트랜스컨덕턴스부로부터 발생된 음(negative)의 신호 및 양(positive)의 신호와 로컬에서 발생된 신호를 혼합하는 스위칭부; A switching unit mixing a negative signal and a positive signal generated from the transconductance unit and a signal generated locally;

상기 스위칭부를 통해 혼합된 신호의 전류 성분을 전압으로 변환하며 광대역 특성을 갖게 하는 부하 저항(R1, R2, R3, R4); Load resistors (R1, R2, R3, R4) for converting current components of the mixed signal into voltages through the switching unit and having broadband characteristics;

전압 이득의 높여주기 위해 전류를 분배하는 전류 브리딩부; 및 A current breathing unit for distributing current to increase the voltage gain; And

상기 부하 저항(R1, R2, R3, R4) 양단에 연결된 캐패시터(C1, C2, C3, C4)로 구성된 것을 특징으로 한다.It is characterized by consisting of capacitors (C1, C2, C3, C4) connected to both ends of the load resistor (R1, R2, R3, R4).

이하, 본 발명의 일 실시예에 의한 광대역 하향 능동 혼합기에 대하여 첨부 된 도면을 참조하여 상세히 설명하기로 한다. 도 2은 본 발명의 일 실시예에 따른 광대역 하향 능동 혼합기의 구성을 나타낸 회로도이다.Hereinafter, a broadband downlink active mixer according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 2 is a circuit diagram illustrating a configuration of a broadband downlink active mixer according to an embodiment of the present invention.

도 2에서 단일모드 입력 신호(RFin)는 트랜스컨덕턴스부(100)에서 차동모드 신호로 변환된다. 이 때, 상기 트랜스컨덕턴스부(100)는 게이트로 상기 단일모드 입력 신호(RFin)를 입력받으면 이를 드레인을 통해 음(negative)의 신호로 출력하는 제 1 NMOS(101)와, 상기 제 1 NMOS(101)의 드레인으로 출력되어 캐패시터(103)를 거친 음(negative)의 신호를 게이트로 입력받아 드레인으로 양(positive)의 신호를 출력하는 제 2 NMOS(102)로 구성되어 있다.In FIG. 2, the single mode input signal RFin is converted into a differential mode signal by the transconductance unit 100. At this time, the transconductance unit 100 receives the single mode input signal RFin through a gate and outputs the first NMOS 101 as a negative signal through a drain, and the first NMOS ( The second NMOS 102 is configured to receive a negative signal, which is output to the drain of 101 and passes through the capacitor 103, and outputs a positive signal to the drain.

이 때, 상기 제 1, 2 NMOS(101, 102)로부터 출력된 두 신호는 스위칭부(200)의 제 3, 4, 7, 8 NMOS(203, 204, 207, 208)의 소스단과 제 5, 6, 9, 10 NMOS(205, 206, 209, 210)의 소스단으로 입력 되어 로컬(LOI+, LOI-, LOQ+, LOQ-)에서 들어 온 신호와 혼합된 후, 각각 상기 제 3 내지 10 NMOS(203 내지 210)의 드레인으로 출력되어 진다.At this time, the two signals output from the first and second NMOS (101, 102) is the source terminal of the third, fourth, seventh and eighth NMOS (203, 204, 207, 208) and the fifth, 6, 9, and 10 NMOS (205, 206, 209, 210) is input to the source terminal and mixed with the signal from the local (LOI +, LOI-, LOQ +, LOQ-), respectively, the third to 10 NMOS ( 203 to 210 are output to the drain.

한편, 상기 스위칭부(200)의 제 3 내지 10 NMOS(203 내지 210)의 드레인으로 출력되어진 전류 성분은 광대역 특성을 얻기 위해 설계한 부하 저항(R1, R2, R3, R4)과 결합되어 전압 성분으로 변환된다. 이 때, 상기 부하 저항(R1, R2, R3, R4)을 통하여 흐르는 전류의 양을 줄여 상기 저항(R1, R2, R3, R4) 값의 크기를 크게함으로, 전체 전압 이득을 향상시키기 위해 전류 브리딩 특성을 갖게하는 전류 브리딩부를 추가로 설계하였다. 상기 전류 브리딩부(300)는 도 2에 도시된 바와 같이 4개의 PMOS(301, 302, 303, 304)로 설계되어 있다. 또한, 출력단의 잡음 특 성을 개선하기 위해 상기 저항 부하(R1, R2, R3, R4)의 양단에는 캐패시터(C1, C2, C3, C4)를 첨가하였다. On the other hand, the current component output to the drain of the third to 10 NMOS (203 to 210) of the switching unit 200 is combined with the load resistors (R1, R2, R3, R4) designed to obtain the broadband characteristics voltage component Is converted to. At this time, by reducing the amount of current flowing through the load resistors (R1, R2, R3, R4) to increase the magnitude of the value of the resistors (R1, R2, R3, R4), current breeding to improve the overall voltage gain An additional design of the current breathing section is provided. As shown in FIG. 2, the current breathing unit 300 is designed with four PMOSs 301, 302, 303, and 304. In addition, capacitors C1, C2, C3, and C4 were added to both ends of the resistive loads R1, R2, R3, and R4 in order to improve noise characteristics of the output terminal.

따라서, 본 발명에 의한 광대역 하향 능동 혼합기는 I(In-phase), Q(Quadrature-phase) 신호와 이것의 차동모드 신호를 동시에 혼합하여 IF(Intermediate Frequency) 신호로 변환하는 하향 혼합기인 것이다.Accordingly, the broadband downlink active mixer according to the present invention is a downlink mixer which simultaneously mixes in-phase (I) and quadrature-phase (I) signals and their differential mode signals and converts them into intermediate frequency (IF) signals.

이상에서 몇 가지 실시예를 들어 본 발명을 더욱 상세하게 설명하였으나, 본 발명은 반드시 이러한 실시예로 국한되는 것이 아니고 본 발명의 기술사상을 벗어나지 않는 범위 내에서 다양하게 변형실시될 수 있다.Although the present invention has been described in more detail with reference to some embodiments, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

상술한 바와 같이 본 발명에 의한 광대역 하향 능동 혼합기에 의하면, 단일 모드로 입력되는 신호를 차동 모드 신호로 변환한 후 스위칭 장치에서 유입되는 전류와 혼합하여 IF 신호로 변환함에 있어, 전류 브리딩 장치를 구성하여 광대역 특성을 나타내는 저항 부하와 전압 이득을 증가시키고, 저항 부하 양단에 캐패시터를 삽입하여 잡음 특성을 향상시켜 주는 뛰어난 효과가 있다.
As described above, according to the broadband downlink active mixer according to the present invention, in converting a signal input in a single mode into a differential mode signal and then mixing the current flowing from the switching device into an IF signal, a current bridging device is configured. Therefore, there is an excellent effect of increasing the resistive load and the voltage gain showing the broadband characteristics, and improving the noise characteristics by inserting capacitors across the resistive load.

Claims (4)

단일모드 입력 신호(RFin)를 차동모드 신호로 변환하는 트랜스컨덕턴스부; A transconductance unit converting the single mode input signal RFin into a differential mode signal; 상기 트랜스컨덕턴스부로부터 발생된 음(negative)의 신호 및 양(positive)의 신호와 로컬에서 발생된 신호를 혼합하는 스위칭부; A switching unit mixing a negative signal and a positive signal generated from the transconductance unit and a signal generated locally; 상기 스위칭부를 통해 혼합된 신호의 전류 성분을 전압으로 변환하며 광대역 특성을 갖게 하는 부하 저항(R1, R2, R3, R4); Load resistors (R1, R2, R3, R4) for converting current components of the mixed signal into voltages through the switching unit and having broadband characteristics; 전압 이득의 높여주기 위해 전류를 분배하는 전류 브리딩부; 및 A current breathing unit for distributing current to increase the voltage gain; And 상기 부하 저항(R1, R2, R3, R4) 양단에 연결된 캐패시터(C1, C2, C3, C4)로 구성된 것을 특징으로 하는 광대역 하향 능동 혼합기. And a capacitor (C1, C2, C3, C4) connected across the load resistors (R1, R2, R3, R4). 제 1항에 있어서, The method of claim 1, 상기 트랜스컨덕턴스부는, 게이트로 단일모드 입력 신호(RFin)를 입력받으면 이를 드레인을 통해 음(negative)의 신호로 출력하는 제 1 NMOS; 및 The transconductance unit may include: a first NMOS outputting a single mode input signal RFin to a gate as a negative signal through a drain; And 상기 제 1 NMOS의 드레인으로 출력되어 캐패시터를 거친 음(negative)의 신호를 게이트로 입력받아 드레인으로 양(positive)의 신호를 출력하는 제 2 NMOS로 구성된 것을 특징으로 하는 광대역 하향 능동 혼합기. And a second NMOS outputted to the drain of the first NMOS and passing a negative signal through a capacitor to a gate, and outputting a positive signal to the drain. 제 1항에 있어서, The method of claim 1, 상기 트랜스컨덕턴스부로부터 출력된 음(negative)의 신호를 각각 소스단으로 입력받아 로컬에서 들어온 신호와 혼합한 후 드레인으로 각각 출력하는 제 3, 4, 7, 8 NMOS; 및 Third, fourth, seventh, and eighth NMOSs that receive negative signals output from the transconductance unit, respectively, and mix them with signals input locally and then output them to drains; And 상기 트랜스컨덕턴스부로부터 출력된 양(positive)의 신호를 각각 소스단으로 입력받아 로컬에서 들어온 신호와 혼합한 후 드레인으로 각각 출력하는 제 5, 6, 9, 10 NMOS로 구성된 것을 특징으로 하는 광대역 하향 능동 혼합기.Broadband downwards comprising fifth, sixth, nineth, and tenth NMOSs, each of which receives a positive signal output from the transconductance unit to a source terminal, mixes with a signal input locally, and then outputs the drain signal to a drain Active mixer. 제 1항에 있어서, The method of claim 1, 상기 전류 브리딩부는, 전류를 분배하는 4개의 PMOS로 구성된 것을 특징으로 하는 광대역 하향 능동 혼합기.The current breathing unit is a broadband downlink active mixer, characterized in that consisting of four PMOS for distributing current.
KR1020040109661A 2004-12-21 2004-12-21 Broadband downstream active mixer KR100669246B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020040109661A KR100669246B1 (en) 2004-12-21 2004-12-21 Broadband downstream active mixer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040109661A KR100669246B1 (en) 2004-12-21 2004-12-21 Broadband downstream active mixer

Publications (2)

Publication Number Publication Date
KR20060070851A true KR20060070851A (en) 2006-06-26
KR100669246B1 KR100669246B1 (en) 2007-01-15

Family

ID=37164425

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020040109661A KR100669246B1 (en) 2004-12-21 2004-12-21 Broadband downstream active mixer

Country Status (1)

Country Link
KR (1) KR100669246B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010107460A1 (en) * 2009-03-17 2010-09-23 Skyworks Solutions, Inc. Saw-less, lna-less low noise receiver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101002777B1 (en) 2008-09-16 2010-12-21 한국과학기술원 Frequency converter and driving method of frequency converter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100505568B1 (en) * 1997-11-18 2005-10-26 삼성전자주식회사 Mixer circuit
JPH11298254A (en) 1998-04-08 1999-10-29 Asahi Chem Ind Co Ltd Mixer circuit
JP2002043852A (en) 2000-07-27 2002-02-08 Mitsubishi Electric Corp Semiconductor integrated circuit
JP2002124834A (en) 2000-10-13 2002-04-26 Matsushita Electric Works Ltd High-frequency mixer circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010107460A1 (en) * 2009-03-17 2010-09-23 Skyworks Solutions, Inc. Saw-less, lna-less low noise receiver
GB2482442A (en) * 2009-03-17 2012-02-01 Skyworks Solutions Inc Saw-less, LNA-less lwo noise receiver
GB2482442B (en) * 2009-03-17 2015-04-29 Skyworks Solutions Inc Saw-less, LNA-less lwo noise receiver
US9071325B2 (en) 2009-03-17 2015-06-30 Skyworks Solutions, Inc. Saw-less, LNA-less low noise receiver
US9667293B2 (en) 2009-03-17 2017-05-30 Skyworks Solutions, Inc. SAW-less, LNA-less low noise receiver
US10404302B2 (en) 2009-03-17 2019-09-03 Skyworks Solutions, Inc. Wireless communication device with a low noise receiver

Also Published As

Publication number Publication date
KR100669246B1 (en) 2007-01-15

Similar Documents

Publication Publication Date Title
TWI360941B (en) Adaptive-biased mixer
TWI304678B (en) Low noise mixer
EP1636901B1 (en) Mixer circuit, receiver comprising a mixer circuit, wireless communication comprising a receiver, method for generating an output signal by mixing an input signal with an oscillator signal
US7277682B2 (en) RF passive mixer with DC offset tracking and local oscillator DC bias level-shifting network for reducing even-order distortion
EP2086109B1 (en) Differential amplifier
KR100487813B1 (en) Single-ended differential circuit using complementary devices
US7915943B2 (en) Mixer circuit
KR101470509B1 (en) A low voltage mixter with improved gain and linearity
US7642816B2 (en) Transconductor
JP2007537631A (en) Third-order modulation cancellation variable circuit
KR20060044314A (en) Apparatus for mixing frequency
CN112491371B (en) High-linearity programmable AB-C class mixed transconductance low-noise transconductance amplifier
Mansour et al. Analysis and design of a reconfigurable wideband I/Q modulator and Ultra-Wideband I/Q demodulator for multi-standard applications
KR100669246B1 (en) Broadband downstream active mixer
US7113755B2 (en) Passive mixer with improved linearity
TWI392222B (en) Mixer capable of improving signal quality
JP2005057629A (en) Mixer circuit
Wan et al. Design of a 2.4 GHz High-Performance Up-Conversion Mixer with Current Mirror Topology.
US7049878B2 (en) Down-converter using an on-chip bias circuit for enhancing symmetry and linearity and testing device thereof
JP2005072735A (en) Receiver
US20060017526A1 (en) Balanced gyrator and devices including the balanced gyrator
Patil et al. A 2.4 GHz double balanced differential input single output low power transmitting mixer In TSMC 180nm CMOS RF process
KR100657009B1 (en) Ultra-wideband up-conversion mixer
KR100650329B1 (en) Receiver using vertical bipolar junction transistor which is embodied in deep n-well cmos technology
Wolf et al. Low noise design of a CMOS gilbert mixer cell in 700 MHz

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee