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1977 IEEE International Solid-State Circuits Conference. Digest of Technical Papers最新文献

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A low-distortion monolithic wideband amplifier 一种低失真单片宽带放大器
Pub Date : 1900-01-01 DOI: 10.1109/isscc.1977.1155646
Kam Chan, R. Meyer
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引用次数: 3
Analog digital converter using Josephson junctions 模拟数字转换器使用约瑟夫森结
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155643
M. Klein
four-bit sequential approximation analog-to-digital unit integrated on a 6.25 mm square chip. It operates in liquid helium at 4.2K. Timing signals are supplied by external equip ment situated at room temperature for the experiment. Figure 1 shows a schematic diagram of the experimental chip. The analog input, which is unipolar and amplitude limited to 8 mA, is applied to a superconducting loop. Across this loop is a Josephson junction switch and the circuit performs the sample-and-hold function. The gate is held in the voltage state by a dc bias for acquisition of signal current from the external input, which is connected across the gate. A sample command pulse to a control line on the gate cancels the bias to return the gate to the superconducting state, trapping the acquired signal as a circulating super current in the loop and holding it for the duration of the A/D conversion cycle. Design considerations for the sample and hold circuit included: use of a large enough inductance so that a large number of flux quanta were stored per least significant bit (LSB); shaping of the junction to give a threshold characteristic capable of resolving an LSB; large enough junction to accept the maximum change between conversion cycles; critical damping of the circuit; junction recovery to the superconducting state at the end of the acquisition period in the presence of the largest rate of change of input signal.
集成在6.25毫米方形芯片上的四位顺序近似模数单元。它在4.2K的液氦中运行。定时信号由位于室温下的外部设备提供。图1为实验芯片的原理图。模拟输入是单极的,振幅限制为8 mA,应用于超导环路。在这个环路上是一个约瑟夫森结开关,电路执行采样和保持功能。栅极通过直流偏置保持在电压状态,用于从连接在栅极上的外部输入获取信号电流。对栅极控制线的采样命令脉冲取消偏置,使栅极返回超导状态,将采集的信号捕获为环路中的循环超级电流,并在A/D转换周期期间保持它。样品和保持电路的设计考虑包括:使用足够大的电感,以便每个最低有效位(LSB)存储大量的磁通量子;对结进行整形,以给出能够分辨LSB的阈值特性;足够大的结,以接受转换周期之间的最大变化;电路的临界阻尼;在输入信号变化率最大的情况下,在采集周期结束时结恢复到超导状态。
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引用次数: 6
Monolithic circuits for a pulse-powered micropower command receiver 脉冲微功率指令接收机的单片电路
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155654
R. Pettengill, J. Meindl
THE STRINGENT REQUIREMENTS imposed on implantable telemetry systems often preclude continuous operation . In such cases, the operating life of battery powered implants must be extended by the use of a radio-controlled power switch, or command receiver, to disconnect the battery when physiological data are not needed. Micropower monolithic circuits for an implantable command receiver have been demonstrated, but their use has been limited by short range and availability problems . Continuous micropower operation limits this 1 5 PA receiver to a carrier frequency of approximately 1 MHz which results in a range of less than 3 m when a hand-held transmitter is used. By using a new minimum duty-cycle pulse powered command receiver, the carrier frequcncy can be increased to 30 MHz with virtually no increase in current drain compared with the theoretical 30 times increase which continuous powered operation requires. This results in a 1 0 times greater range of 30 m and markedly reduced frequency of false triggering with a receiver drawing only 20 pA of current. The range increase results from improved antenna efficiency and reduced antenna noise figure at the higher frequency3. Receiver availability is substantially enhanced through the use of a Kitchip requiring only one custom metal mask to implement the receiver using a dic with a fixed layout of monolithic elcmcnts4. A block diagram of the pulse powered receiver is shown in Figure 1, and its specifications are given in Table 1. The RF amplifier and detector (Figure 2 u ) are pulse powered reducing power consumption from 1 2 mW to 30 pW of power. While monolithic circuits can be built readily with useful gain at 30 MHz, the inductor tuning or feedback methods typically required to reduce power dissipation and bandwidth in a receiver are not practical in a monolithic realization. However, operation of the receiver in a pulse powcrcd or sampling mode allows the average power dissipation to be reduced5 along with signal bandwidth very easily. Figure 3 shows how this occurs. Previously this pulse-powered technique has been applied to receiver 1
植入式遥测系统的严格要求往往妨碍了连续运行。在这种情况下,电池供电的植入物的使用寿命必须通过使用无线电控制的电源开关或命令接收器来延长,当不需要生理数据时断开电池。用于可植入指令接收器的微功率单片电路已经得到证实,但其使用受到短距离和可用性问题的限制。连续的微功率操作将这个1.5 PA接收器限制在大约1 MHz的载波频率上,当使用手持发射器时,其范围小于3米。通过使用一种新的最小占空比脉冲供电命令接收机,载波频率可以增加到30 MHz,而电流损耗几乎没有增加,而连续供电操作需要理论增加30倍。这使得30米的范围增大了10倍,并且显著降低了误触发的频率,接收器仅绘制20pa的电流。距离的增加是由于天线效率的提高和天线高频噪声系数的降低。通过使用Kitchip,接收器的可用性大大增强,只需一个定制的金属掩模就可以使用具有固定单片电子布局的dic实现接收器4。脉冲供电接收机的框图如图1所示,其规格如表1所示。射频放大器和检测器(图2u)采用脉冲供电,将功耗从12 mW降低到30 pW。虽然单片电路可以很容易地以30mhz的有用增益构建,但通常需要降低接收器功耗和带宽的电感调谐或反馈方法在单片实现中是不实用的。然而,在脉冲电源或采样模式下,接收器的操作可以很容易地降低平均功耗5和信号带宽。图3显示了这是如何发生的。以前,这种脉冲供电技术已应用于接收器1
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引用次数: 0
Low loss PIN diode for high power MIC phase shifter 用于大功率MIC移相器的低损耗PIN二极管
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155664
Pang-Ting Ho, G. Swartz, A. Schwarzmann
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引用次数: 3
A 4K static clocked and nonclocked RAM design 一个4K静态时钟和非时钟RAM设计
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155675
T. O'Connell, J. Hartman, E. Errett, G. Leach, W. Dunn
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引用次数: 12
Impact of LSI on the telecommunications network LSI对电信网络的影响
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155673
D. Chisholm
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引用次数: 0
A word alterable ROM 一个字可变的ROM
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155709
W. Spence, G. Lockwood, M. Shen, M. Trudel
A WORD ALTERABLE ROM (1024x4 P-channel nonvolatile memory) will be described. It can be used as a block erasable programmable ROM or as a word alterable RAM. Erase and write times are variable depending on the application and data retentivity required. A prime objective is microprocessor system compatibility. All address, data, control and clock lines are TTL compatible with pull-up resistors t o +5V. Input address, data and control lines are latched. Data outputs hold for the duration of the Chip Enable clock and then return to an open circuit condition for operation on a common data bus. Access time is 650 ns.
一个WORD可变ROM (1024x4 p通道非易失性存储器)将被描述。它可以用作块可擦可编程ROM或字可更改RAM。擦除和写入时间是可变的,这取决于所需的应用程序和数据保留性。首要目标是微处理器系统的兼容性。所有的地址,数据,控制和时钟线都是TTL兼容的上拉电阻到+5V。输入地址、数据和控制线被锁存。数据输出在芯片使能时钟的持续时间内保持,然后返回到开路状态,以便在公共数据总线上操作。接入时间为650ns。
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引用次数: 0
Modeling I2L performance and operational limits 模拟I2L性能和操作限制
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155677
D. Estreich, R. Dutton
CONVENTIONAL integrated injection logicl~’ (12L) has the attractive features of high density, low power-delay product, and simple fabrication sequence. However, the NPN current gain falloff associated with narrow, high fanout 12L gates severely limits the maximum gate operational speed. Furthermore, high current effects reduce injector transport efficiency, thus, increasing the powerdelay product. Figure 1 shows a complete 12L macromodel which includes the NPN current gain falloff and injector high current effects. Lateral current transport between adjacent gates is included in the macromodel’. The macromodel is synthesized from standard circuit elements making it compatible with commonly used circuit simulators, and, except for the NPN base resistance, requires only readily measured electrical parameters for definition; Table I. Ebers-Moll equivalent circuits are used to model the NPN transistor action of each collector; Q 1 Qq in Figure 1 for a fanout of four gate. Modeling the high-current NPN current gain falloff characteristics requires proper partitioning of the NPN base recombination currents and inclusion of the base resistance. Figure 2(a) illustrates the partitioning of the NPN base region for a narrow, fanout of four gate with base contact nearest the injector end. Section A is the base contact region and sections B-E are the active regions. The fractional recombination current for each active section is modeled by the dc current gain of the NPN, whereas, for the base contact region, it is accounted for by the saturation current of diode DCN. Base current measurements are required for gates of differing fanout counts using a consistent set of layout rules and fabrication. Figure 2(b) shows the partitioned base region with injected current de current paths, assuming the injector to be located at the base contact end of the base region. Using the geometry of these shaded current paths and the base sheet resistance, the b a e resistance components may be determined. Base resistance components, RBI R B ~ , are included in the macromodel as -
传统的集成注射逻辑(12L)具有密度高、产品功耗低、制作流程简单等优点。然而,与窄的高扇出12L栅极相关的NPN电流增益衰减严重限制了栅极的最大工作速度。此外,高电流效应降低了注入器传输效率,从而增加了功率延迟积。图1显示了一个完整的12L宏模型,包括NPN电流增益衰减和注入器高电流效应。相邻栅极之间的横向电流传输包含在宏模型中。宏模型由标准电路元件合成,使其与常用的电路模拟器兼容,并且,除了NPN基极电阻外,只需要容易测量的电气参数即可定义;表1 . Ebers-Moll等效电路用于模拟每个集电极的NPN晶体管作用;q1 Qq在图1中为四门扇出。对大电流NPN电流增益衰减特性进行建模需要对NPN基极重组电流进行适当的划分,并包含基极电阻。图2(a)示出了NPN基区的划分,为一个狭窄的四栅极扇出,基触点最靠近喷射器端。截面A为基接触区域,截面B-E为活动区域。每个有源部分的分数级复合电流由NPN的直流增益来建模,而基极接触区域的分数级复合电流由二极管DCN的饱和电流来表示。使用一套一致的布局规则和制造,需要对不同扇出计数的门进行基本电流测量。图2(b)显示了带有注入电流去电流路径的划分基区,假设注入器位于基区的基极接触端。利用这些阴影电流路径的几何形状和基片电阻,可以确定b - a - e电阻分量。基电阻分量RBI RB ~以-形式包含在宏模型中
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引用次数: 1
Internally matched microwave broadband linear power FET 内部匹配微波宽带线性功率场效应管
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155712
Y. Takayama, K. Honjo, A. Higahisaka, F. Hasegawa
IN MICROWAVE circuit applications of high power GaAs FETs with as much as 1-W output, matching limitations for lowimpedance devices, resulting from fixed parasitic elements in mounting and packaging of device chips, are serious problems. To solve such matching limitations and achieve broadband power amplification, the introduction of internal matching networks seems effective. This paper will describe broadband internal matching developed for high-power GaAs MESFETs at C-band, adopting both small-signal and large-signal characterizations in the circuit design. The internally matched FET that has been developed is 4.5 mm in length, has a 1-W power output at 1-dB gain compression and a 1.8-W saturated power output with a linear gain of 6.5 dB from 4.6 to 7.6 GHz, without external matching. The FET has a two-cell single-chip structure which has 56 parallel-gates with four bonding pads, and four drain pads. The gate length is 1.3 p m and the total gate width is 5600 pm. To reduce bonding wire inductance for source grounding, the source electrode is grounded by metal thin films evaporated on the device periphery without bonding wires. An input-matching network of the lumped-element twosection low-pass type and an output-matching network of one-section semidistributed form were designed, as shown in Figure 1. For broadband power amplification, the design of the input and output networks was based on the use of measured small-signal S-parameters of the FET chip. Initial values for the input network elements were determined by defining a Chebyshev impedance-matching network of lowpass filter form, after canceling an input reactance with a series inductance at 6 GHz. Then, based on the initial circuit element values and the S-parameters, detailed fitting was performed by computer simulation. In this process of simulation, especially for the output network, to achieve broadband high-power saturation, large-signal matching was attempted by considering the increase of the optimum load conductance of the FET with the increase of input power drive level. With an equivalent load-pull characterization method’ developed in the laboratory, large-signal power-load characteristics of the FET with the internal matching networks were measured. It was confirmed, as shown in Figure 3, that the optimum load for power output approaches 5 0 o h m with the increase of input power level. In the figure, the bullets show small-signal output impedances and triangler/squares indicate optimum power load impedances in large-signal operation. Now, the small-signal optimum load impedance is the complex
在微波电路中,输出功率高达1 w的高功率GaAs场效应管的应用,由于器件芯片的安装和封装中的固定寄生元件,对低阻抗器件的匹配限制是一个严重的问题。为了解决这种匹配限制,实现宽带功率放大,引入内部匹配网络似乎是有效的。本文将描述c波段高功率GaAs mesfet的宽带内部匹配,在电路设计中采用小信号和大信号两种特性。已开发的内部匹配FET长度为4.5 mm,在1 dB增益压缩下具有1 w的功率输出和1.8 w的饱和功率输出,在4.6至7.6 GHz范围内线性增益为6.5 dB,无需外部匹配。该场效应管具有双单元单芯片结构,具有56个平行栅极和4个键合衬垫和4个漏极衬垫。闸门长度为1.3 pm,闸门总宽度为5600pm。为了降低源接地的键合线电感,源电极的接地采用蒸发在器件外围的金属薄膜,不使用键合线。设计了集总单元两段低通型输入匹配网络和一段半分布型输出匹配网络,如图1所示。对于宽带功率放大,输入输出网络的设计是基于使用FET芯片测量的小信号s参数。输入网元的初始值是通过定义一个低通滤波器形式的切比雪夫阻抗匹配网络来确定的,然后用6 GHz的串联电感抵消一个输入电抗。然后,根据初始电路元件值和s参数,通过计算机仿真进行详细拟合。在仿真过程中,特别是对于输出网络,为了实现宽带高功率饱和,考虑到FET的最佳负载电导随着输入功率驱动电平的增加而增加,尝试进行大信号匹配。利用实验室开发的等效负载-拉力表征方法,测量了具有内部匹配网络的场效应管的大信号功率-负载特性。如图3所示,随着输入功率的增加,功率输出的最佳负载接近50 0 h m。图中,子弹表示小信号输出阻抗,三角形/正方形表示大信号运行时的最佳功率负载阻抗。目前,小信号最佳负载阻抗是复杂的
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引用次数: 18
All FET communications satellite transponder receiver 所有FET通信卫星转发器接收器
Pub Date : 1900-01-01 DOI: 10.1109/ISSCC.1977.1155699
P. Bura, R. Dikshit, P. Mercer
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引用次数: 0
期刊
1977 IEEE International Solid-State Circuits Conference. Digest of Technical Papers
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