Abstract:
PURPOSE: A circuit using a vertical bipolar junction transistor as a current source in a standard triple well CMOS process is provided to improve a phase noise characteristic by forming a bias current source of a voltage controlled oscillator with the vertical bipolar junction transistor. CONSTITUTION: A plurality of negative resistance cells(301,305) are used for generating negative resistance elements of a voltage controlled oscillator. An LC tank is connected among the negative resistance cells and a first power supply in order to change a frequency of an output signal by changing an impedance according to a control voltage. A current source is connected among the negative resistance cells and a second power supply in order to supply a constant current. The current source is formed in a standard triple well CMOS process having a deep n well. An emitter is formed by an n+ source-drain diffusion region a CMOS process. A base is formed by a p well and a p+ source-drain diffusion region. A collector is formed by a deep n well, an n well, and an n+ source-drain diffusion region.
Abstract:
본 발명은 씨모스 롬을 이용한 회로장치에 관한 것으로, 특히 일반 롬 대신에 씨모스 롬을 이용하여 한 번의 표준 씨모스 공정만으로 원칩화가 가능한 씨모스 롬을 이용한 회로 장치에 관한 것이다. 그 장치는 표준 CMOS(Complementary Metal Oxide Semiconductor) 공정으로 구현된 ROM(Read Only Memory)을 이용하여, 상기 ROM이 포함된 회로장치의 다른 소자들과 함께 표준 CMOS공정으로 동시 집적이 가능한 것을 특징으로 한다. 본 발명에 의하면, 종래의 일반 롬 대신에 본 출원인에 의해 개발된 씨모스 롬을 이용함으로써, 표준 씨모스 공정만을 이용하여 원칩화가 가능함으로 집적도가 높아지며 비용을 크게 절감시킬 수 있다. CMOS ROM, 명령어 디코딩 룩업 테이블, 제어 정보 룩업 테이블, 모듈레이터
Abstract:
A receiver using a vertical BJT(Bipolar Junction Transistor) realized by a deep n-well CMOS(Complementary Metal Oxide Semiconductor) is provided to reduce I/f noise, consequently linearity is improved while mismatch between I(In-phase) and Q(Quadrature) channels is solved. An input unit(210) amplifies a small input signal so as to have little noise deterioration, and outputs an output signal. A converter(220) converts the output signal into the first and second differential signals without distortion, and outputs the converted signals. The first and second differential signals are cross-coupled together in a transmitter(230), and the cross-coupled signals are outputted from the transmitter(230). A mixer unit(240) consists of the first mixer stage(241) for mixing the first differential signal with I and Q local oscillation signals, and the second mixer stage(242) for mixing the second differential signal with the I and Q local oscillation signals.
Abstract:
본 발명은 통신 시스템에 관한 것으로서, 본 발명은 DC 오프셋, I/Q회로 간 정합 특성, 및 잡음 특성이 개선된 수신 감도가 우수한 직접 변환 수신기에 관한 것이다. 본 발명에 따른 깊은 엔웰을 갖는 3중웰 씨모스 공정으로 구현된 수직형 바이폴라 접합 트랜지스터 제조방법은 수직형 바이폴라 접합 트랜지스터를 포함하는 바이-씨모스(BiCMOS) 트랜지스터 제조방법에 있어서, 깊은 N웰을 갖는 3중웰 CMOS 공정에서 구현되며, 에미터는 CMOS 공정의 N+ 소스-드레인 확산영역에 의하여 형성되고, 베이스는 CMOS 공정의 P웰 및 P+ 소스-드레인 확산영역에 의하여 형성되며, 콜렉터는 CMOS 공정의 깊은 N웰, N웰 및 N+ 콘텍트에 의하여 형성되며, 수직형 바이폴라 접합 트랜지스터의 P웰은 쉘로우(shallow) p-베이스 임플란트(p-base implant) 공정에 의하여 P웰의 두께가 감소되는 것을 특징으로 이루어진다. 수직형 바이폴라 접합 트랜지스터, 표준 CMOS 공정, 수신기, 믹서, 증폭기
Abstract:
본 발명은 표준 3중 웰 CMOS 공정에서 구현된 수직형 바이폴라 정션 트랜지스터를 이용하는 전압 제어 발진기, 차동 회로, 및 전류 미러 회로에 관한 것이다. 본 발명의 일실시예에 따르면, 전압 제어 발진기는 부성 저항 성분을 생성하기 위한 부성 저항 셀, 제어 전압에 의하여 임피던스를 가변시킴으로써 출력 신호의 주파수를 가변시키는 LC 탱크, 및 일정한 전류를 공급하기 위한 전류 소오스를 포함하되, 전류 소오스는 깊은 n웰을 가지는 표준 3중 웰 CMOS 공정에서 구현되고, 에미터는 CMOS 공정의 n+ 소스-드레인 확산영역에 의하여 형성되고, 베이스는 CMOS 공정의 p웰, p+ 소스-드레인 확산영역에 의하여 형성되며, 콜렉터는 CMOS 공정의 깊은 n웰, n웰 및 n+ 소스-드레인 확산영역에 의하여 형성되는 수직형 바이폴라 정션 트랜지스터로 구현된다. 또한, 본 발명의 다른 실시예에 따르면, 전압 제어 발진기의 부성 저항 셀, 각종 차동 회로의 전류 소오스, 또는 전류 미러 회로의 능동 소자를 수직형 바이폴라 정션 트랜지스터로 구현함으로써, 전체 회로의 위상 잡음 특성과 1/f 잡음 특성 및 소자간 정합 특성을 개선시키며 동작 전압의 여유(voltage head room)를 높일 수 있다.
Abstract:
PURPOSE: A direct conversion receiver using a vertical BJT(Bipolar Junction Transistor) embodied by a deep n-well CMOS(Complementary Metal Oxide Semiconductor) process is provided to improve a DC offset, a matching feature between I/O signals and an 1/f noise feature. CONSTITUTION: A BPF(Band Pass Filter)(501) passes a specific band of a receiving signal. An LNA(Low Noise Amplifier)(503) amplifies the signal of the BPF(501). An active mixer(505) mixes the signal outputted from the LNA(503) with a local oscillation signal, and outputs a scalar baseband signal. A baseband analog circuit(507) filters and amplifies the baseband signal outputted from the active mixer(505). The active mixer(505) is embodied in a triple-well CMOS process. The active mixer(505) has a switching element embodied as a vertical BJT. An emitter of the switching element is formed by an n+ source-drain diffusion region of the CMOS process, and a base of the switching element is formed by a p-well and a p+ source-drain diffusion region of the CMOS process. A collector of the switching element is formed by a deep n-well, an n-well and an n+ source-drain diffusion region of the CMOS process.
Abstract:
A circuit apparatus is provided to implement a SOC(System On Chip) through only standard CMOS process by using a CMOS ROM instead of a conventional ROM. A circuit apparatus using a CMOS ROM can be integrated with other devices of the circuit apparatus including a ROM(Read Only Memory) implemented by a standard CMOS(Complementary Metal Oxide Semiconductor) process, through the standard CMOS process. In the ROM, first to third input stages are comprised and data is stored by a voltage applied to the input stages. A cell access transistor includes a gate and a drain forming the second input stage and a source forming the third input stage, and is enabled by a voltage applied between the gate and the source. A high voltage blocking transistor includes a gate, a drain and a source connected to the drain of the cell access transistor, and conducts a current to the source from the drain by a bias voltage applied to the gate, and prevents a high voltage applied to the third input stage from being directly applied to the cell access transistor. An anti-fuse transistor includes a gate forming the third input stage and a source and a drain connected to the drain of the high voltage blocking transistor, and a high voltage is applied to the third input stage, and a gate oxide is broken down when the cell access transistor is enabled.
Abstract:
This invention is about the direct conversion receiver. It is excellent the receiving sensitivity that DC off-set, matching characteristics of the relationship of I/Q circuits and noise characteristics are improved. In order to achieve this purpose, the direct conversion receiver uses vertical bipolar junction transistor available in standard triple-well CMOS technology in the switching element of mixer and base-band analog circuits. Furthermore, as using the passive mixer in the other practical example of this invention, this invention controls the occurrence of l/f noise. As using the vertical bipolar junction transistor available in standard triple-well CMOS in the base-band analog circuits, this invention realizes the direct conversion receiver that DC off-set, matching characteristics of the relationship of I/Q circuit and noise characteristics are improved.